ORCID Profile
0000-0002-8500-606X
Current Organisation
University of Wollongong
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Physical Chemistry (Incl. Structural) | Physical Chemistry of Materials | Macromolecular and Materials Chemistry | Chemical Thermodynamics and Energetics | Photodetectors, Optical Sensors and Solar Cells | Structural Chemistry and Spectroscopy | Functional Materials | Optical Physics | Colloid And Surface Chemistry | Synthesis of Materials | Organic Chemical Synthesis | Manufacturing Engineering Not Elsewhere Classified | Electrical and Electronic Engineering | Electrochemistry | Transport Properties and Non-Equilibrium Processes | Nanomanufacturing | Physical Chemistry not elsewhere classified | Organic Semiconductors | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Molecular and Organic Electronics | Optics And Opto-Electronic Physics | Condensed Matter Characterisation Technique Development
ANZSRC Socio-Economic Objective (SEO)
Solar-Photovoltaic Energy | Expanding Knowledge in the Chemical Sciences | Solar-photoelectric | Renewable energy | Expanding Knowledge in Technology | Hydrogen Production from Renewable Energy | Expanding Knowledge in the Biological Sciences |
Related Links
Publications
Dye Regeneration Kinetics in Dye-Sensitized Solar Cells
Publisher: American Chemical Society (ACS)
Date: 05-10-2012
DOI: 10.1021/JA3054578
Abstract: The ideal driving force for dye regeneration is an important parameter for the design of efficient dye-sensitized solar cells. Here, nanosecond laser transient absorption spectroscopy was used to measure the rates of regeneration of six organic carbazole-based dyes by nine ferrocene derivatives whose redox potentials vary by 0.85 V, resulting in 54 different driving-force conditions. It was found that the reaction follows the behavior expected for the Marcus normal region for driving forces below 29 kJ mol(-1) (ΔE = 0.30 V). Driving forces of 29-101 kJ mol(-1) (ΔE = 0.30-1.05 V) resulted in similar reaction rates, indicating that dye regeneration is diffusion controlled. Quantitative dye regeneration (theoretical regeneration yield 99.9%) can be achieved with a driving force of 20-25 kJ mol(-1) (ΔE ≈ 0.20-0.25 V).
Comparison of inorganic electron transport layers in fully roll-to-roll coated/printed organic photovoltaics in normal geometry
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA06746H
Abstract: Four different inorganic materials as electrode transport layers in fully roll-to-roll P3HT:ICxA organic solar cells were investigated.
Effects of atomic layer deposited thin films on dye sensitized solar cell performance
Publisher: American Vacuum Society
Date: 22-12-2011
DOI: 10.1116/1.3670397
Abstract: The application of thin titania films by atomic layer deposition on top of a low temperature nanoparticulate TiO2 electrode was found to enhance the performance of dye sensitized solar cells. Dynamic measurements of photoinduced charge extraction showed that the atomic layer deposited top coat increased the electron lifetime at the same electron density. This was attributed to an increased electron trap concentration, which resulted in slower charge transport and increased charge carrier lifetimes.
Enhanced Electron Lifetimes in Dye-Sensitized Solar Cells Using a Dichromophoric Porphyrin: The Utility of Intermolecular Forces
Publisher: American Chemical Society (ACS)
Date: 24-09-2015
Abstract: Electron lifetimes in dye-sensitized solar cells employing a porphyrin dye, an organic dye, a 1:1 mixture of the two dyes, and a dichromophoric dye design consisting of the two dyes using a nonconjugated linker were measured, suggesting that the dispersion force of the organic dyes has a significant detrimental effect on the electron lifetime and that the dichromophoric design can be utilized to control the effect of the dispersion force.
Trap-Assisted Transport and Non-Uniform Charge Distribution in Sulfur-Rich PbS Colloidal Quantum Dot-based Solar Cells with Selective Contacts
Publisher: American Chemical Society (ACS)
Date: 24-11-2015
Abstract: This study reports evidence of dispersive transport in planar PbS colloidal quantum dot heterojunction-based devices as well as the effect of incorporating a MoO3 hole selective layer on the charge extraction behavior. Steady state and transient characterization techniques are employed to determine the complex recombination processes involved in such devices. The addition of a selective contact drastically improves the device efficiency up to 3.15% (especially due to increased photocurrent and decreased series resistance) and extends the overall charge lifetime by suppressing the main first-order recombination pathway observed in device without MoO3. The lifetime and mobility calculated for our sulfur-rich PbS-based devices are similar to previously reported values in lead-rich quantum dots-based solar cells. Nevertheless, strong Shockley-Read-Hall mechanisms appear to keep restricting charge transport, as the equilibrium voltage takes more than 1 ms to be established.
Zn-Zn porphyrin dimer-sensitized solar cells: Toward 3-D light harvesting
Publisher: American Chemical Society (ACS)
Date: 09-10-2009
DOI: 10.1021/JA9057713
Abstract: Zn-Zn porphyrin dimers have been incorporated into thin dye-sensitized solar cells (DSSCs) to boost their light harvesting efficiency. The photoexcited dimers show efficient and fast electron injection into TiO(2) indicating that both photoexcited chromophores contribute to current generation. The improved light harvesting ability coupled to enhanced DSSC performance demonstrates the potential of 3-D light harvesting arrays as next generation light harvesters for artificial solar energy conversion systems.
Multisample Correlation Reveals the Origin of the Photocurrent of an Unstable Cu2O Photocathode during CO2Reduction
Publisher: American Chemical Society (ACS)
Date: 19-08-2021
Enhanced performance of dye sensitized solar cells utilizing platinum electrodeposit counter electrodes
Publisher: The Electrochemical Society
Date: 2008
DOI: 10.1149/1.2919107
Catalytic Decomposition of an Organic Electrolyte to Methane by a Cu Complex-Derived In Situ CO2 Reduction Catalyst
Publisher: American Chemical Society (ACS)
Date: 27-10-2023
Four Orders of Magnitude Acceleration of Electron Recombination at the Dye-TiO2/Electrolyte Interface Severely Limiting Photocurrent with High-Oxidation-Potential Cu2+/1+ Complexes
Publisher: American Chemical Society (ACS)
Date: 12-04-2023
Coexistence of femtosecond- and nonelectron-injecting dyes in dye-sensitized solar cells: Inhomogeniety limits the efficiency
Publisher: American Chemical Society (ACS)
Date: 18-10-2011
DOI: 10.1021/JP2093109
Insight into the Origin of Trapping in Polymer/Fullerene Blends with a Systematic Alteration of the Fullerene to Higher Adducts
Publisher: American Chemical Society (ACS)
Date: 31-01-2022
Solvent-Dependent Functional Aggregates of Unsymmetrical Squaraine Dyes on TiO2 Surface for Dye-Sensitized Solar Cells
Publisher: American Chemical Society (ACS)
Date: 23-11-2022
DOI: 10.1021/ACS.LANGMUIR.2C02469
Abstract: Alkyl group wrapped donor-acceptor-donor (D-A-D) based unsymmetrical squaraine dyes
Aqueous Dye-Sensitized Solar Cell Electrolytes Based on the Ferricyanide-Ferrocyanide Redox Couple
Publisher: Wiley
Date: 30-01-2012
Abstract: Solar energy conversion efficiencies of over 4% have been achieved in DSCs constructed with aqueous electrolytes based on the ferricyanide-ferrocyanide redox couple, thereby avoiding the use of expensive, flammable and toxic solvents. This paradigm shift was made possible by the use of a hydrophobic organic carbazole dye.
Perylene Sensitization of Fullerenes for Improved Performance in Organic Photovoltaics
Publisher: Wiley
Date: 14-06-2011
A comparison of five experimental techniques to measure charge carrier lifetime in polymer/fullerene solar cells
Publisher: Wiley
Date: 18-10-2015
Investigation of S-shaped current-voltage characteristics in high-performance solution-processed small molecule bulk heterojunction solar cells
Publisher: Elsevier BV
Date: 11-2018
The effect of molecule size and shape on free charge generation, transport and recombination in all-thiophene dendrimer:fullerene bulk heterojunctions
Publisher: Elsevier BV
Date: 04-2010
Charge carrier mobility in regioregular poly(3-hexylthiophene) probed by transient conductivity techniques: A comparative study
Publisher: American Physical Society (APS)
Date: 27-01-2005
Sodium fluoride-assisted modulation of anodized TiO 2 nanotube for dye-sensitized solar cells application
Publisher: American Chemical Society (ACS)
Date: 22-04-2011
DOI: 10.1021/AM200147B
Abstract: This work reports the use of sodium fluoride (in ethylene glycol electrolyte) as the replacement of hydrofluoric acid and ammonium fluoride to fabricate long and perpendicularly well-aligned TiO₂ nanotube (TNT) (up to 21 μm) using anodization. Anodizing duration, applied voltage and electrolyte composition influenced the geometry and surface morphologies of TNT. The growth mechanism of TNT is interpreted by analyzing the current transient profile and the total charge density generated during anodization. The system with low water content (2 wt %) yielded a membrane-like mesoporous TiO₂ film, whereas high anodizing voltage (70 V) resulted in the unstable film of TNT arrays. An optimized condition using 5 wt % water content and 60 V of anodizing voltage gave a stable array of nanotube with controllable length and pore diameter. Upon photoexcitation, TNTs synthesized under this condition exhibited a slower charge recombination rate as nanotube length increased. When made into cis-diisothiocyanato-bis(2,2̀-bipyridyl-4,4̀-dicarboxylato) ruthenium(II) bis (tetrabutyl-ammonium)(N719) dye-sensitized solar cells, good device efficiency at 3.33 % based on the optimized TNT arrays was achieved with longer electron time compared with most mesoporous TiO₂ films.
Reduced bimolecular recombination in conjugated polymer donor/fullerene acceptor bulk heterojunction solar cells
Publisher: CSIRO Publishing
Date: 2012
DOI: 10.1071/CH12028
Abstract: We show significantly reduced bimolecular recombination in a novel silole-based copolymer (KP115):fullerene blend, which allows the fabrication of polymer solar cells with relatively thick active layers. This leads to improved device efficiencies and makes roll-to-roll printing much easier. The origin of the reduced recombination, however, is not known. Our recent data suggest that published models are inadequate to explain this phenomenon.
Novel Regiospecific MDMO-PPV Polymers with Improved Charge Transport Properties for Bulk Heterojunction Solar Cells
Publisher: Elsevier BV
Date: 09-2005
Charge transport in dye-sensitized solar cells based on flame-made TiO 2 nanoparticles
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2010
Double injection as a technique to study charge carrier transport and recombination in bulk-heterojunction solar cells
Publisher: AIP Publishing
Date: 22-11-2005
DOI: 10.1063/1.2137454
Abstract: Ambipolar charge carrier mobility and recombination in bulk-heterojunction solar cells based on the mixture of regioregular poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]-methanofullerene (PCBM) has been studied using injection current transients. The experimental results demonstrate double injection with bimolecular recombination limiting the injection current. We found that charge carrier bimolecular recombination is significantly reduced compared to Langevin recombination. We have measured the temperature and electric field dependence of the reduced bimolecular recombination coefficient and the results suggest that the electron and hole pathways are different and the recombination is controlled by the probability of the carriers to meet at the polymer/PCBM interface.
Cation exchange at semiconducting oxide surfaces: Origin of light-induced performance increases in porphyrin dye-sensitized solar cells
Publisher: American Chemical Society (ACS)
Date: 30-05-2013
DOI: 10.1021/JP3067712
Exploiting Intermolecular Interactions between Alkyl-Functionalized Redox-Active Molecule Pairs to Enhance Interfacial Electron Transfer
Publisher: American Chemical Society (ACS)
Date: 27-09-2018
DOI: 10.1021/JACS.8B09070
Abstract: The strategies to enhance electron transfer rates between redox-active, light-harvesting molecules attached to semiconductor surfaces and redox mediators in solution by modifying molecular structure are not fully investigated yet. Therefore, the design of molecules with controlled electron transfer rates remains a challenge. The aims of this work are to quantify the effect of long alkyl chain substitution on the electron transfer from cobalt(II/III) tris(2,2'-bipyridine) to organic molecules containing carbazole and thiophene and to demonstrate that alkyl chains can be used to enhance electron transfer between donor-acceptor pairs. To this end, we study the effect of using a combination of donor and acceptor molecules with and without alkyl chains on electron transfer kinetics. Using transient absorption spectroscopy, we show that when only the molecules or the mediators have long alkyl chains, electron transfer is slightly blocked as expected. Counterintuitively, electron transfer is up to 13 times faster when long alkyl chains are attached to both the redox-active molecules and the redox mediators. The faster electron transfer is explained by an alkyl-alkyl chain interaction between the donor/acceptor, leading to the proximity (trapping) of the redox mediators close to the π-conjugated backbone of the molecules. These results suggest that intermolecular interactions can be used to enhance the electron transfer rates significantly even with well-established insulating alkyl chains attached to molecules without changing the electrochemical driving force.
Serpinb9 is a marker of antigen cross-presenting dendritic cells
Publisher: Elsevier BV
Date: 02-2017
DOI: 10.1016/J.MOLIMM.2016.12.011
Abstract: Serpinb9 (Sb9, also called Spi6) is an intracellular inhibitor of granzyme B (grB) that protects cytotoxic lymphocytes from grB-mediated death. In addition, Sb9 is also expressed in accessory immune cells, including dendritic cells (DCs), although its role is debated. Recently, we have demonstrated that Sb9 plays a grB-independent role in cross-presentation of antigens by CD8
Enhanced performance of dye-sensitized solar cells using carbazole-substituted di-chromophoric porphyrin dyes
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA03226H
Abstract: Non-conjugated di-chromophoric zinc porphyrin dyads showed simultaneously improved V OC and J SC compared to the single zinc porphyrin.
The origin of open circuit voltage of porphyrin-sensitised TiO2 solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B805027A
Abstract: Electron lifetime and diffusion coefficient measurements in highly efficient porphyrin-sensitised TiO(2) solar cells showed reduced electron lifetime, and consequently, lower photo-induced electron density under illumination compared to commonly used ruthenium dye (N719)-sensitised solar cells, which is proposed to be the origin of the generally lower open circuit voltage.
Quantifying Recombination Losses during Charge Extraction in Bulk Heterojunction Solar Cells Using a Modified Charge Extraction Technique
Publisher: Wiley
Date: 12-01-2017
Optical analysis of an integrated solar cell and a photon up converter, providing guidance for future device engineering efforts
Publisher: AIP Publishing
Date: 16-11-2021
DOI: 10.1063/5.0072034
Abstract: To date, a number of photon up-conversion (UC) systems with high quantum efficiencies have been demonstrated, including at non-concentrated solar illumination intensities. These are, however, yet to be successfully combined with photovoltaic devices in order to provide substantial increases in photocurrent, as compared with devices without UC. In the present work, we perform simple calculations, based on the optical properties of an UC + solar cell system, specifically a dye-sensitized solar cell and sensitized-triplet-triplet annihilation based UC system, in line with our previous experimentally realized proof-of-concept devices. This model is then used to more specifically identify the limitations and losses, thereby providing a pathway toward improvements, based on either real or hypothetical materials. This model highlights that only a fraction of the benefit may be realized without substantial improvements being made in terms of various transmission losses, coupled with the fact that UC emission typically scales quadratically in this flux regime. The model presented can help identify where research efforts should be focused as well as where there may be little utility, with these lessons also being valuable in the future as even more efficient UC systems are developed. Furthermore, a spreadsheet is provided in the supplementary material to assist other researchers in their efforts.
Effect of Molecular Structure on Interfacial Electron Transfer Kinetics in the Framework of Classical Marcus Theory
Publisher: Wiley
Date: 07-10-2022
Abstract: The factors affecting electron transfer at semiconductor electrodes sensitised with molecules and in contact with redox electrolytes have been studied for decades. Here, the influence of molecular structural factors enhancing or slowing down electron transfer rates at dye‐sensitised electrode interfaces are analysed by Marcus theory. Back electron transfer between TiO 2 electrons and oxidised redox mediators are slowed down by reducing electronic coupling using alkyl chains or by minimising attractive intermolecular forces. Electron transfer between surface‐bound molecules and the electron donors, while generally also slowed down by alkyl chains, can also be enhanced by alkyl‐alkyl interactions. This review highlights the a priori difficult to predict effect of changing molecular structures on electron transfer. Systematic studies employing electron transfer measurements with fast time resolutions is needed to advance knowledge in this important area.
Enhanced Electron Lifetime of CdSe/CdS Quantum Dot (QD) Sensitized Solar Cells Using ZnSe Core–Shell Structure with Efficient Regeneration of Quantum Dots
Publisher: American Chemical Society (ACS)
Date: 23-01-2015
DOI: 10.1021/JP510339Z
Effects of Interfacial Layers on the Open Circuit Voltage of Polymer/Fullerene Bulk Heterojunction Devices Studied by Charge Extraction Techniques
Publisher: American Chemical Society (ACS)
Date: 13-05-2019
Abstract: Interfacial layers are frequently used in organic solar cells performing various functions, including blocking surface recombination, improving selectivity of charge carrier extraction, modification of the work function of the contact materials, and enhancing light absorption within the photoactive layer through an optical cavity effect. The aim of this work is to investigate the origin of performance enhancement of bulk heterojunction solar cells using various electron and hole interfacial layers, with a particular focus on separating the contributions of work function modification and reduced recombination to the improvement of the open circuit voltage ( V
Solid State Photon Up-Conversion Emission from Chromophore-Tethered PPV Films
Publisher: American Chemical Society (ACS)
Date: 07-07-2021
Synthesis and characterization of perylene–bithiophene–triphenylamine triads: studies on the effect of alkyl-substitution in p-type NiO based photocathodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM16847B
Quantitative characterisation of conductive fibers by capacitive coupling
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7AN00442G
Abstract: The application of a capacitively coupled contactless conductivity sensor for the quantitative characterization of conductive fibers.
Charge carrier mobility, bimolecular recombination and trapping in polycarbazole copolymer:fullerene (PCDTBT:PCBM) bulk heterojunction solar cells
Publisher: Elsevier BV
Date: 11-2012
Enhancement of dye regeneration kinetics in dichromophoric porphyrin–carbazole triphenylamine dyes influenced by more exposed radical cation orbitals
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6SC00429F
Abstract: Dye regeneration kinetics is enhanced by five times in a di-chromophoric porphyrin dye by attaching tridimensionally enlarged electron donor moieties.
Nanoelectrodes: energy conversion and storage
Publisher: Elsevier BV
Date: 06-2009
A coupled chemo-mechanical model to study the effects of adhesive strength on the electrochemical performance of silicon electrodes for advanced lithium ion batteries
Publisher: Elsevier BV
Date: 12-2018
Enhanced interfacial electron transfer kinetics between Co2+/3+ complexes and organic dyes with free space near their backbone
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CP05798G
Abstract: Enhanced electronic coupling is achieved by opening up appropriate free spaces near the π-conjugated backbone of organic dyes enhancing electron transfer rates by six times.
Effect of the Cu2+/1+ Redox Potential of Non-Macrocyclic Cu Complexes on Electrochemical CO2 Reduction
Publisher: MDPI AG
Date: 03-07-2023
DOI: 10.3390/MOLECULES28135179
Abstract: Cu2+/1+ complexes facilitate the reduction of CO2 to valuable chemicals. The catalytic conversion likely involves the binding of CO2 and/or reduction intermediates to Cu2+/1+, which in turn could be influenced by the electron density on the Cu2+/1+ ion. Herein we investigated whether modulating the redox potential of Cu2+/1+ complexes by changing their ligand structures influenced their CO2 reduction performance significantly. We synthesised new heteroleptic Cu2/1+ complexes, and for the first time, studied a (Cu-bis(8-quinolinolato) complex, covering a Cu2+/1+ redox potential range of 1.3 V. We have found that the redox potential influenced the Faradaic efficiency of CO2 reduction to CO. However, no correlation between the redox potential and the Faradaic efficiency for methane was found. The lack of correlation could be attributed to the presence of a Cu-complex-derived catalyst deposited on the electrodes leading to a heterogeneous catalytic mechanism, which is controlled by the structure of the in situ deposited catalyst and not the redox potential of the pre-cursor Cu2+/1+ complexes.
Immune regeneration in irradiated mice is not impaired by the absence of DPP9 enzymatic activity
Publisher: Springer Science and Business Media LLC
Date: 13-05-2019
DOI: 10.1038/S41598-019-43739-W
Abstract: The ubiquitous intracellular protease dipeptidyl peptidase 9 (DPP9) has roles in antigen presentation and B cell signaling. To investigate the importance of DPP9 in immune regeneration, primary and secondary chimeric mice were created in irradiated recipients using fetal liver cells and adult bone marrow cells, respectively, using wild-type (WT) and DPP9 gene-knockin (DPP9 S729A ) enzyme-inactive mice. Immune cell reconstitution was assessed at 6 and 16 weeks post-transplant. Primary chimeric mice successfully regenerated neutrophils, natural killer, T and B cells, irrespective of donor cell genotype. There were no significant differences in total myeloid cell or neutrophil numbers between DPP9-WT and DPP9 S729A -reconstituted mice. In secondary chimeric mice, cells of DPP9 S729A -origin cells displayed enhanced engraftment compared to WT. However, we observed no differences in myeloid or lymphoid lineage reconstitution between WT and DPP9 S729A donors, indicating that hematopoietic stem cell (HSC) engraftment and self-renewal is not diminished by the absence of DPP9 enzymatic activity. This is the first report on transplantation of bone marrow cells that lack DPP9 enzymatic activity.
Electrochemical CO2 Reduction to Methane by Cu Complex-Derived Catalysts in Non-Aqueous Media
Publisher: Wiley
Date: 12-06-2023
Abstract: Electrochemical CO 2 reduction using Cu complex catalysts in non‐aqueous media leads exclusively to carbon monoxide or formic acid. This study reports highly selective electrochemical CO 2 reduction to methane using a 2,9‐dimethyl‐1,10‐phenanthroline Cu 2+ complex in dimethylformamide. XRD reveals the formation of a Cu complex‐derived catalyst during the electrochemical testing, containing Cu and an organic phase when the electrolyte contained tetrabutylammonium cations. Insulating carbonates were preferentially deposited when the electrolyte contained alkali metal cations, leading to low Faradaic efficiency for methane. The dramatic electrolyte dependence is explained by the relative solubility of deposits in dimethylformamide under reductive potentials. The Faradaic efficiency for methane production varied from s le to s le, with underlaying variation in the morphology of the catalyst. Selective methane production using Cu complex‐derived catalysts in non‐aqueous media is intriguing, opening the possibility of combinatorial studies of the effect of ligand structures on product selectivity by involving ligands not soluble in water.
Substrate-Dependent Electron-Transfer Rate of Mixed-Ligand Electrolytes: Tuning Electron-Transfer Rate without Changing Driving Force
Publisher: American Chemical Society (ACS)
Date: 22-12-2021
DOI: 10.1021/JACS.0C12050
Dye-sensitized solar cell with integrated triplet-triplet annihilation upconversion system
Publisher: American Chemical Society (ACS)
Date: 11-06-2013
DOI: 10.1021/JZ401050U
Abstract: Photon upconversion (UC) by triplet-triplet annihilation (TTA-UC) is employed in order to enhance the response of solar cells to sub-bandgap light. Here, we present the first report of an integrated photovoltaic device, combining a dye-sensitized solar cell (DSC) and TTA-UC system. The integrated device displays enhanced current under sub-bandgap illumination, resulting in a figure of merit (FoM) under low concentration (3 suns), which is competitive with the best values recorded to date for nonintegrated systems. Thus, we demonstrate both the compatibility of DSC and TTA-UC and a viable method for device integration.
Significant Effect of Electronic Coupling on Electron Transfer between Surface-Bound Porphyrins and Co2+/3+ Complex Electrolytes
Publisher: American Chemical Society (ACS)
Date: 09-04-2020
Injection Limitations in a Series of Porphyrin Dye-Sensitized Solar Cells
Publisher: American Chemical Society (ACS)
Date: 29-01-2010
DOI: 10.1021/JP908401K
Partial loss of actin nucleator actin‐related protein 2/3 activity triggers blebbing in primary T lymphocytes
Publisher: Wiley
Date: 23-12-2020
DOI: 10.1111/IMCB.12304
Dye regeneration and charge recombination in dye-sensitized solar cells with ferrocene derivatives as redox mediators
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2EE21257A
Light soaking effect driven in porphyrin dye-sensitized solar cells using 1D TiO2 nanotube photoanodes
Publisher: Elsevier BV
Date: 07-2020
Immune regeneration in irradiated mice is not impaired by the absence of DPP9 enzymatic activity
Publisher: Cold Spring Harbor Laboratory
Date: 10-2018
DOI: 10.1101/431775
Abstract: The ubiquitous intracellular protease dipeptidyl peptidase 9 (DPP9) has roles in antigen presentation and B cell signaling. To investigate the importance of DPP9 in immune regeneration, primary and secondary chimeric mice were created in irradiated recipients using fetal liver cells and adult bone marrow cells, respectively, using wild-type (WT) and DPP9 gene-knockin (DPP9 S729A ) enzyme-inactive mice. Immune cell reconstitution was assessed at 6 and 16 weeks post-transplant. Primary chimeric mice successfully regenerated neutrophils, natural killer, T and B cells, irrespective of donor cell genotype. There were no significant differences in total myeloid cell or neutrophil numbers between DPP9-WT and DPP9 S729A -reconstituted mice. There were fewer B cells in the DPP9 S729A -origin compared to DPP9 WT-origin mice in primary chimeric mice. In secondary chimeric mice, cells of DPP9 S729A -origin cells displayed enhanced engraftment compared to WT. However, we observed no differences in myeloid or lymphoid lineage reconstitution between WT and DPP9 S729A donors, indicating that hematopoietic stem cell (HSC) engraftment and self-renewal is not diminished by the absence of DPP9 enzymatic activity. This is the first report on transplantation of bone marrow cells that lack DPP9 enzymatic activity.
Porphyrins for dye-sensitised solar cells: New insights into efficiency-determining electron transfer steps
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC30677H
Abstract: Porphyrin molecules offer immense potential as the light harvesting component of dye-sensitised nanocrystalline TiO(2) solar cells. Synthetic porphyrin dyes were amongst the first dyes trialled for sensitisation of inorganic semiconducting oxides. Today, they exhibit the best performance reported for dye-sensitised solar cells. Accompanying the significant performance improvement over the last two decades is a much improved understanding of efficiency-determining fundamental electron transfer steps, from charge photogeneration to recombination. In this feature article we highlight our recent discoveries of the influence of porphyrin molecule structure on efficiency determining electron transfer kinetics and device performance by systematically changing the molecular structure and observing electron injection and recombination kinetics using time-resolved optical and electrical probes. Despite our observation of ultrafast charge injection for all porphyrin dyes studied by transient absorption spectroscopy, the injection yield estimated using an internal standard remains below 100% and depends strongly on the molecular structure. The observed discrepancy between kinetic competition and the injection yield is attributed to non-injecting dyes, probably arising due to inhomogeneity. A very interesting sub-ns (0.5 ns to 100 ns) charge recombination channel between photo-injected electrons and porphyrin cations is observed, which is found to be more prominent in free-base porphyrin dyes with a conjugated linker. Charge recombination between the acceptor species in the redox containing electrolyte and injected electrons is shown to be an important limitation of most porphyrin-sensitised solar cells, accelerated by the presence of porphyrin molecules at the TiO(2)-electrolyte interface. This recombination reaction is strongly dependent on the porphyrin molecular structure. Bulky substituents, using a porphyrin dimer instead of a porphyrin monomer, a light soaking treatment of freshly prepared films and co-sensitization of TiO(2) with multiple dyes are shown to be successful strategies to improve electron lifetime. Finally, new developments unique to porphyrin dye-sensitised solar cells, including performance enhancements from a light exposure treatment of a zinc porphyrin dye, a significant performance improvement observed after co-sensitisation of TiO(2) with free-base and zinc porphyrin dyes and the use of porphyrin dimers with increased light harvesting in thin-film TiO(2) solar cells are described.
The role of emissive charge transfer states in two polymer–fullerene organic photovoltaic blends: tuning charge photogeneration through the use of processing additives
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA02244K
Abstract: One polymer:PCBM blend has an emissive charge transfer state that is quenched by a processing additive, while the other's charge transfer state dissociates very efficiently.
Multiple liver insults synergize to accelerate experimental hepatocellular carcinoma.
Publisher: Springer Science and Business Media LLC
Date: 06-07-2018
DOI: 10.1038/S41598-018-28486-8
Abstract: The urgent unmet need for hepatocellular carcinoma (HCC) therapies is addressed here by characterising a novel mouse model of HCC in the context of ongoing liver damage and overnutrition. Male C57Bl/6J mice were treated with diethylnitrosamine (DEN) and thioacetamide (TAA), and some were provided with an atherogenic high fat diet (HFD). Inflammation, steatosis, fibrosis, 87 genes, liver lesions and intratumoural leukocyte subsets were quantified up to 24 weeks of age. Adding HFD to DEN/TAA increased fibrosis, steatosis and inflammation, and the incidence of both HCC and non-HCC dysplastic lesions. All lesions contained α-SMA positive fibroblasts. Macrophage marker F4/80 was not significantly different between treatment groups, but the macrophage-associated genes Arg-1 and Cd47 were differentially expressed. Fibrosis, cancer and cell death associated genes were upregulated in DEN/TAA/HFD livers. Fewer Kupffer cells and plasmacytoid dendritic cells were in tumours compared to control liver. In conclusion, combining a hepatotoxin with an atherogenic diet produced more intrahepatic tumours, dysplastic lesions and fibrosis compared to hepatotoxin alone. This new HCC model provides a relatively rapid means of examining primary HCC and potential therapies in the context of multiple hepatotoxins including those derived from overnutrition.
A Study of Redox Mediator Types and Their Quenching Effects on the Triplet–Triplet Annihilation Photon Upconversion Process
Publisher: American Chemical Society (ACS)
Date: 02-10-2023
Characterisation of graphene fibres and graphene coated fibres using capacitively coupled contactless conductivity detector
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5AN02534F
Abstract: The use of capacitively coupled contactless conductivity detection (C 4 D) for the characterisation of thin conductive graphene fibres, graphene composite fibres, and graphene coated fibrous materials is demonstrated for the first time.
Identification of Novel Natural Substrates of Fibroblast Activation Protein-alpha by Differential Degradomics and Proteomics
Publisher: Elsevier BV
Date: 2019
Porphyrin dimers harvest more sunlight for next-generation solar cells
Publisher: SPIE-Intl Soc Optical Eng
Date: 2009
Remarkable synergistic effects in a mixed porphyrin dye-sensitized TiO 2 film
Publisher: AIP Publishing
Date: 18-04-2011
DOI: 10.1063/1.3576904
Abstract: A remarkable 300% efficiency enhancement driven by a matching increase in the short circuit current was observed in a mixed porphyrin dye-sensitized solar cell constructed from two dyes in a 3:1 ratio. Absorbed photon-to-current conversion efficiency measurements indicate an improved charge injection yield for both dyes in the mixture. Several possible origins for the observed performance enhancement are discussed.
Sustained solar hydrogen generation using a dye-sensitised NiO photocathode/BiVO 4 tandem photo-electrochemical device
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2EE22866A
Significant performance improvement of porphyrin-sensitized TiO2 solar cells under white light illumination
Publisher: American Chemical Society (ACS)
Date: 15-12-2011
DOI: 10.1021/JP107615H
Macrophage development and activation involve coordinated intron retention in key inflammatory regulators
Publisher: Oxford University Press (OUP)
Date: 25-05-2020
DOI: 10.1093/NAR/GKAA435
Abstract: Monocytes and macrophages are essential components of the innate immune system. Herein, we report that intron retention (IR) plays an important role in the development and function of these cells. Using Illumina mRNA sequencing, Nanopore direct cDNA sequencing and proteomics analysis, we identify IR events that affect the expression of key genes roteins involved in macrophage development and function. We demonstrate that decreased IR in nuclear-detained mRNA is coupled with increased expression of genes encoding regulators of macrophage transcription, phagocytosis and inflammatory signalling, including ID2, IRF7, ENG and LAT. We further show that this dynamic IR program persists during the polarisation of resting macrophages into activated macrophages. In the presence of proinflammatory stimuli, intron-retaining CXCL2 and NFKBIZ transcripts are rapidly spliced, enabling timely expression of these key inflammatory regulators by macrophages. Our study provides novel insights into the molecular factors controlling vital regulators of the innate immune response.
A Novel Covalently Linked Zn Phthalocyanine-Zn Porphyrin Dyad for Dye-sensitized Solar Cells
Publisher: Wiley
Date: 17-06-2016
Abstract: A novel Zn phthalocyanine‐Zn porphyrin (ZnPc‐ZnPor) dyad ( 1 ), in which a zinc porphyrin moiety is linked covalently with an ABAB‐type zinc phthalocyanine moiety, has been designed and synthesized. The ZnPc‐ZnPor dyad 1 can absorb over a wide spectral range of visible light. The fluorescence spectrum of dyad 1 revealed an intramolecular efficient energy transfer from Zn porphyrin to Zn phthalocyanine. When dyad 1 was used as a light‐harvesting sensitizer for dye‐sensitized solar cells, the cell sensitized by dyad 1 provided a power conversion efficiency of 2.7 % under simulated air mass 1.5 global sunlight. The incident photon‐to‐current efficiency spectrum of the dyad 1 cell suggested the contribution of both components in dyad 1 for the current generation.
The impact of insufficient time resolution on dye regeneration lifetime determined using transient absorption spectroscopy
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CP01217G
Abstract: The impact of insufficient time resolution on regeneration lifetime was elucidated using regeneration lifetimes of a combination of dyes and redox mediators determined by transient absorption (TA) spectrometers with 0.5 ns and 6 ns time resolutions.
Photovoltaic activity of a PolyProDOT derivative in a bulk heterojunction solar cell
Publisher: Elsevier BV
Date: 12-2006
Tuning of the photoinduced charge transfer process in donor-acceptor double-cable copolymers
Publisher: SPIE
Date: 06-02-2004
DOI: 10.1117/12.503913
Conjugated polymer photovoltaic devices and materials
Publisher: Elsevier BV
Date: 05-2006
An intermediate band dye-sensitised solar cell using triplet–triplet annihilation
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP04825G
Abstract: A new mechanism of charge photogeneration is demonstrated for the first time, based on organic molecular structures.
A nonconjugated bridge in dimer-sensitized solar cells retards charge recombination without decreasing charge injection efficiency
Publisher: American Chemical Society (ACS)
Date: 04-11-2013
DOI: 10.1021/AM403022D
Abstract: Dye sensitized solar cells (DSSCs) employing a dimer porphyrin, which was synthesised with two porphyrin units connected without conjugation, have shown that both porphyrin components can contribute to photocurrent generation, that is, more than 50 % internal quantum efficiency. In addition, the open-circuit voltage (Voc) of the DSSCs was higher than that of DSSCs using monomer porphyrins. In this paper, we first optimized cell structure and fabrication conditions. We obtained more than 80% incident photon to current conversion efficiency from the dimer porphyrin sensitized DSSCs and higher Voc and energy conversion efficiency than monomer porphyrin sensitized solar cells. To examine the origin of the higher Voc, we measured electron lifetime in the DSSCs with various conditions, and found that the dimer system increased the electron lifetime by improving the steric blocking effect of the dye layer, whilst the lack of a conjugated linker prevents an increase in the attractive force between conjugated sensitizers and the acceptor species in the electrolyte. The results support a hypothesis dispersion force is one of the factors influencing the electron lifetime in DSSCs.
Recombination of photogenerated and injected charge carriers in π-conjugated polymer/fullerene blends
Publisher: Elsevier BV
Date: 07-2006
Molecular Geometry Dependent Electronic Coupling and Reorganization Energy for Electron Transfer between Dye Molecule Adsorbed on TiO2Electrode and Co Complex in Electrolyte Solutions
Publisher: American Chemical Society (ACS)
Date: 11-02-2022
Carbon nanotube/graphene nanocomposite as efficient counter electrodes in dye-sensitized solar cells
Publisher: IOP Publishing
Date: 02-2012
DOI: 10.1088/0957-4484/23/8/085201
Abstract: We demonstrated the replacement of the Pt catalyst normally used in the counter electrode of a dye-sensitized solar cell (DSSC) by a nanocomposite of dry spun carbon multi-walled nanotube (MWNT) sheets with graphene flakes (Gr-F). The effectiveness of this counter electrode on the reduction of the triiodide in the iodide/triiodide redox (I(-)/I(3)(-)) redox reaction was studied in parallel with the use of the dry spun carbon MWNT sheets alone and graphene flakes used independent of each other. This nanocomposite deposited onto fluorinated tin-oxide-coated glass showed improved catalytic behavior and power conversion efficiency (7.55%) beyond the use of the MWNTs alone (6.62%) or graphene alone (4.65%) for the triiodide reduction reaction in DSSC. We also compare the use of the carbon MWNT/Gr-F composite counter electrode with a DSSC using the standard Pt counter electrode (8.8%). The details of increased performance of graphene/MWNT composite electrodes as studied are discussed in terms of increased catalytic activity permitted by sharp atomic edges that arise from the structure of graphene flakes or the defect sites in the carbon MWNT and increased electrical conductivity between the carbon MWNT bundles by the graphene flakes.
Mesoporous anatase single crystals for efficient Co(2+/3+)-based dye-sensitized solar cells
Publisher: Elsevier BV
Date: 2015
Synergistic Effect of Alkyl Chain Barriers on Heteroleptic Ruthenium Dyes and Co3+/2+Complex Mediators for Reduced Charge Recombination in Dye-Sensitized Solar Cells
Publisher: American Chemical Society (ACS)
Date: 28-09-2020
Microsecond Dye Regeneration Kinetics in Efficient Solid State Dye-Sensitized Solar Cells Using a Photoelectrochemically Deposited PEDOT Hole Conductor
Publisher: American Chemical Society (ACS)
Date: 29-06-2010
DOI: 10.1021/JA1026453
Abstract: Microsecond dye-regeneration kinetics was observed in efficient solid state dye-sensitized solar cells using photoelectrochemically deposited poly(3,4-ethylenedioxythiophene (PEDOT) hole conductors using transient absorption spectroscopy. The dye-regeneration rate is orders of magnitude slower than the case using the I(-)/I(3)(-) redox couple or commonly used small molecule hole conductor and is attributed to the low dye to PEDOT ratio within the films.
Tuning non langevin recombination in an organic photovoltaic blend using a processing additive
Publisher: American Chemical Society (ACS)
Date: 19-03-2015
DOI: 10.1021/JP5129707
Charge carrier transport and recombination in bulk-heterojunction solar-cells
Publisher: SPIE
Date: 18-08-2005
DOI: 10.1117/12.614864
Charge Transport and Recombination in Donor-Acceptor Bulk Heterojunction Solar Cells
Publisher: Wiley
Date: 08-09-2006
Dichromophoric zinc porphyrins: Filling the absorption gap between the soret and Q bands
Publisher: American Chemical Society (ACS)
Date: 27-02-2015
ILC2s and T cells cooperate to ensure maintenance of M2 macrophages for lung immunity against hookworms
Publisher: Springer Science and Business Media LLC
Date: 27-04-2015
DOI: 10.1038/NCOMMS7970
Abstract: Defining the immune mechanisms underlying protective immunity to helminth infection remains an important challenge. Here we report that lung CD4(+) T cells and Group 2 innate lymphoid cells (ILC2s) work in concert to block Nippostrongylus brasiliensis (Nb) development in the parenchyma within 48 h in mice. Immune-damaged larvae have a striking morphological defect that is dependent on the expansion of IL-13-producing ILC2 and CD4(+) T cells, and the activation of M2 macrophages. This T-cell requirement can be bypassed by administration of IL-2 or IL-33, resulting in expansion of IL-13-producing ILC2s and larval killing. Depletion of ILC2s inhibits larval killing in IL-2-treated mice. Our results broaden understanding of ILC2's role in immunity to helminths by demonstrating that they not only act as alarmin sensors, but can also be sustained by CD4(+) T cells, ensuring both the prompt activation and the maintenance of IL-13-dependent M2 macrophage immunity in the lung.
Bimolecular Recombination Coefficient as a Sensitive Testing Parameter for Low-Mobility Solar-Cell Materials
Publisher: American Physical Society (APS)
Date: 05-05-2005
Efficient dye-sensitized solar cells based on a 2-thiophen-2-yl-vinyl-conjugated ruthenium photosensitizer and a conjugated polymer hole conductor
Publisher: AIP Publishing
Date: 24-07-2006
DOI: 10.1063/1.2240296
Abstract: Efficient dye-sensitized TiO2 solar cells based on a 2-thiophen-2-yl-vinyl-conjugated ruthenium photosensitizer and a conjugated polymer poly(3,4-ethylenedioxythiophene) have been fabricated. A maximum power conversion efficiency of 2.6% is achieved when the mesoporous TiO2 layer is 5–6μm. The high fill factor (0.74), the open circuit voltage (0.78V), and the linear light intensity dependence of the short circuit current density (4.5mAcm−2 at 100mWcm−2) make these devices promising for solid state photovoltaic applications.
An Atypical Parvovirus Drives Chronic Tubulointerstitial Nephropathy and Kidney Fibrosis.
Publisher: Elsevier BV
Date: 10-2018
Photodegradation in Encapsulated Silole‐Based Polymer: PCBM Solar Cells Investigated using Transient Absorption Spectroscopy and Charge Extraction Measurements
Publisher: Wiley
Date: 11-07-2013
Disorder engineering of undoped Tio2 nanotube arrays for highly efficient solar-driven oxygen evolution
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CP03177F
Abstract: Fine-tuning of the bandgap structure of undoped highly ordered TiO 2 nanotube arrays for efficient photo-electrochemical water oxidation.
Photo-electrocatalytic hydrogen generation at dye-sensitised electrodes functionalised with a heterogeneous metal catalyst
Publisher: Elsevier BV
Date: 11-2016
Charge carrier mobility and lifetime versus composition of conjugated polymer/fullerene bulk-heterojunction solar cells
Publisher: Elsevier BV
Date: 08-2006
Flexible and Compressible Goretex−PEDOT Membrane Electrodes for Solid-State Dye-Sensitized Solar Cells
Publisher: American Chemical Society (ACS)
Date: 10-11-2009
DOI: 10.1021/LA903507M
Abstract: A porous, flexible electrode based on a PTFE (Teflon) membrane (Goretex) coated with a metallic current collector and a conducting polymer (poly(3,4-ethylenedioxythiophene), PEDOT) has been developed for applications in solid-state dye-sensitized solar cells. Its low sheet resistance and compressibility make it an ideal electrode on uneven TiO(2) surfaces with high efficiency and reproducibility. The porous nature of the electrode enables the feed-through of reactants and treatment agents, which opens up exciting opportunities to interface these photoelectrochemical devices with electrocatalytic, energy conversion, and storage systems. Postfabrication bonding of the photoanode and the Goretex-Au-PEDOT electrode is demonstrated.
Time-dependent mobility and recombination of the photoinduced charge carriers in conjugated polymer/fullerene bulk heterojunction solar cells
Publisher: American Physical Society (APS)
Date: 20-07-2005
Evidence for encaging luminescent guest molecules in the inner cages of zeolite host
Publisher: The Chemical Society of Japan
Date: 15-12-2007
DOI: 10.1246/BCSJ.80.2303
Electrochemical CO2Reduction Catalyzed by Copper Molecular Complexes: The Influence of Ligand Structure
Publisher: American Chemical Society (ACS)
Date: 15-04-2022
Highly efficient photocathodes for dye-sensitized tandem solar cells
Publisher: Springer Science and Business Media LLC
Date: 29-11-2200
DOI: 10.1038/NMAT2588
Abstract: Thin-film dye-sensitized solar cells (DSCs) based on mesoporous semiconductor electrodes are low-cost alternatives to conventional silicon devices. High-efficiency DSCs typically operate as photoanodes (n-DSCs), where photocurrents result from dye-sensitized electron injection into n-type semiconductors. Dye-sensitized photocathodes (p-DSCs) operate in an inverse mode, where dye-excitation is followed by rapid electron transfer from a p-type semiconductor to the dye (dye-sensitized hole injection). Such p-DSCs and n-DSCs can be combined to construct tandem solar cells (pn-DSCs) with a theoretical efficiency limitation well beyond that of single-junction DSCs (ref. 4). Nevertheless, the efficiencies of such tandem pn-DSCs have so far been h ered by the poor performance of the available p-DSCs (refs 3, 5-15). Here we show for the first time that p-DSCs can convert absorbed photons to electrons with yields of up to 96%, resulting in a sevenfold increase in energy conversion efficiency compared with previously reported photocathodes. The donor-acceptor dyes, studied as photocathodic sensitizers, comprise a variable-length oligothiophene bridge, which provides control over the spatial separation of the photogenerated charge carriers. As a result, charge recombination is decelerated by several orders of magnitude and tandem pn-DSCs can be constructed that exceed the efficiency of their in idual components.
Significantly Reduced Bimolecular Recombination in a Novel Silole‐Based Polymer: Fullerene Blend
Publisher: Wiley
Date: 12-09-2011
Negative electric field dependence of charge carrier drift mobility in conjugated, semiconducting polymers
Publisher: Elsevier BV
Date: 05-2004
Non-Langevin bimolecular recombination in a silole-based polymer:PCBM solar cell measured by time-resolved charge extraction and resistance-dependent time-of-flight techniques
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1EE02434E
Dipeptidyl Peptidase Inhibition Enhances CD8 T Cell Recruitment and Activates Intrahepatic Inflammasome in a Murine Model of Hepatocellular Carcinoma
Publisher: MDPI AG
Date: 11-2021
Abstract: The mRNA expression of the dipeptidyl peptidase 4 (DPP4) gene family is highly upregulated in human hepatocellular carcinoma (HCC) and is associated with poor survival in HCC patients. Compounds that inhibit the DPP4 enzyme family, such as talabostat and ARI-4175, can mediate tumour regression by immune-mediated mechanisms that are believed to include NLRP1 activation. This study investigated the expression and activity of the DPP4 family during the development of HCC and evaluated the efficacy of ARI-4175 in the treatment of early HCC in mice. This first report on this enzyme family in HCC-bearing mice showed DPP9 upregulation in HCC, whereas intrahepatic DPP8/9 and DPP4 enzyme activity levels decreased with age. We demonstrated that ARI-4175 significantly lowered the total number of macroscopic liver nodules in these mice. In addition, ARI-4175 increased intrahepatic inflammatory cell infiltration, including CD8+ T cell numbers, into the HCC-bearing livers. Furthermore, ARI-4175 activated a critical component of the inflammasome pathway, caspase-1, in these HCC-bearing livers. This is the first evidence of caspase-1 activation by a pan-DPP inhibitor in the liver. Our data suggest that targeting the DPP4 enzyme family may be a novel and effective approach to promote anti-tumour immunity in HCC via caspase-1 activation.
Improved performance of porphyrin-based dye sensitised solar cells by phosphinic acid surface treatment
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B909709K
Charge transport and recombination in bulk heterojunction solar cells studied by the photoinduced charge extraction in linearly increasing voltage technique
Publisher: AIP Publishing
Date: 08-03-2005
DOI: 10.1063/1.1882753
Abstract: Charge carrier mobility and recombination in a bulk heterojunction solar cell based on the mixture of poly[2-methoxy-5-(3,7-dimethyloctyloxy)-phenylene vinylene] (MDMO-PPV) and 1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)-C61 (PCBM) has been studied using the novel technique of photoinduced charge carrier extraction in a linearly increasing voltage (Photo-CELIV). In this technique, charge carriers are photogenerated by a short laser flash, and extracted under a reverse bias voltage r after an adjustable delay time (tdel). The Photo-CELIV mobility at room temperature is found to be μ=2×10−4cm2V−1s−1, which is almost independent on charge carrier density, but slightly dependent on tdel. Furthermore, determination of charge carrier lifetime and demonstration of an electric field dependent mobility is presented.
Driving Force Dependence of Electron Transfer Kinetics and Yield in Low-Band-Gap Polymer Donor–Acceptor Organic Photovoltaic Blends
Publisher: American Chemical Society (ACS)
Date: 26-05-2015
Origin of Photoelectrochemical Generation of Dihydrogen by a Dye-Sensitized Photocathode without an Intentionally Introduced Catalyst
Publisher: American Chemical Society (ACS)
Date: 10-11-2017
Flexible Polymer X-ray Detectors with Non-fullerene Acceptors for Enhanced Stability: Toward Printable Tissue Equivalent Devices for Medical Applications
Publisher: American Chemical Society (ACS)
Date: 22-11-2021
Bimolecular Recombination in a Low Bandgap Polymer:PCBM Blend Solar Cell with a High Dielectric Constant
Publisher: American Chemical Society (ACS)
Date: 30-03-2016
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