ORCID Profile
0000-0003-4948-6147
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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)
Functional Materials | Materials Engineering | Physical Chemistry of Materials | Nanomaterials | Physical Chemistry not elsewhere classified | Synthesis of Materials | Chemical Characterisation of Materials | Physical Chemistry (Incl. Structural) | Structural Chemistry and Spectroscopy | Surfaces and Structural Properties of Condensed Matter
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Urban and Industrial Water Management | Expanding Knowledge in Engineering | Integrated Circuits and Devices |
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).
Optical properties of a conjugated-polymer-sensitised solar cell: the effect of interfacial structure
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CP05290K
Abstract: Organic dye chemically adsorbed onto {100} facet of TiO 2 : experimental absorption better matched by the non-standard facet.
Solution‐Processable, Solid State Donor–Acceptor Materials for Singlet Fission
Publisher: Wiley
Date: 14-09-2018
Wafer-Scale Synthesis of Semiconducting SnO Monolayers from Interfacial Oxide Layers of Metallic Liquid Tin
Publisher: American Chemical Society (ACS)
Date: 18-10-2017
Abstract: Atomically thin semiconductors are one of the fastest growing categories in materials science due to their promise to enable high-performance electronic and optical devices. Furthermore, a host of intriguing phenomena have been reported to occur when a semiconductor is confined within two dimensions. However, the synthesis of large area atomically thin materials remains as a significant technological challenge. Here we report a method that allows harvesting monolayer of semiconducting stannous oxide nanosheets (SnO) from the interfacial oxide layer of liquid tin. The method takes advantage of van der Waals forces occurring between the interfacial oxide layer and a suitable substrate that is brought into contact with the molten metal. Due to the liquid state of the metallic precursor, the surface oxide sheet can be delaminated with ease and on a large scale. The SnO monolayer is determined to feature p-type semiconducting behavior with a bandgap of ∼4.2 eV. Field effect transistors based on monolayer SnO are demonstrated. The synthetic technique is facile, scalable and holds promise for creating atomically thin semiconductors at wafer scale.
The catalytic decomposition of carbon dioxide on zinc‐exchanged Y‐zeolite at low temperatures
Publisher: Wiley
Date: 16-06-2021
DOI: 10.1002/JCTB.6815
Abstract: We report our recent study on the use of a zinc‐modified NaY zeolite to decompose CO 2 at a temperature range between 300 and 550 °C. At a reaction temperature of 450 °C, we observed that 70% of CO 2 was converted with an insignificant quantity of CO produced. Scanning electron microscopy and Fourier transform infrared spectroscopic analysis of the neat and spent catalysts confirmed the presence of carbon nanostructures after the reaction. In addition to this, CHN analysis supports these results by providing weight percent (0.73 wt%) of carbon after reaction. Stability of the catalyst was further confirmed with slight/no change in X‐ray diffraction technique. This route potentially offers a facile strategy to achieve CO 2 decomposition and an explanation of the formation of carbon on zinc‐modified zeolite catalysts. © 2021 Society of Chemical Industry (SCI).
Improved Photovoltages for p-Type Dye-Sensitized Solar Cells Using CuCrO2 Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 30-06-2014
DOI: 10.1021/JP409363U
Synthesis of Insulated Heteroaromatic Platinum-Acetylide Complexes with Color-Tunable Phosphorescence in Solution and Solid States
Publisher: American Chemical Society (ACS)
Date: 22-01-2020
Abstract: Phosphorescence colors of cyclodextrin-based insulated Pt-acetylide complexes were tuned by the molecular engineering of the chromophores. A series of Pt complexes bearing various acetylide ligands, including heteroaromatics, were prepared via self-inclusion of the linked macrocycles with the complexes. The decline in the inclusion efficiency derived from the heteroaromatics was overcome by the late-stage insulation via intramolecular slippage after the construction of the Pt-acetylide complexes. The cyclic protection of the thus-formed complexes prevented phosphorescence quenching via molecular interactions, even in the solid state. Accordingly, the tuned emission colors in a dilute system were replicated in the solid state.
Tantalum Oxide as an Efficient Alternative Electron Transporting Layer for Perovskite Solar Cells
Publisher: MDPI AG
Date: 25-02-2022
DOI: 10.3390/NANO12050780
Abstract: Electron transporting layers facilitating electron extraction and suppressing hole recombination at the cathode are crucial components in any thin-film solar cell geometry, including that of metal–halide perovskite solar cells. Amorphous tantalum oxide (Ta2O5) deposited by spin coating was explored as an electron transport material for perovskite solar cells, achieving power conversion efficiency (PCE) up to ~14%. Ultraviolet photoelectron spectroscopy (UPS) measurements revealed that the extraction of photogenerated electrons is facilitated due to proper alignment of bandgap energies. Steady-state photoluminescence spectroscopy (PL) verified efficient charge transport from perovskite absorber film to thin Ta2O5 layer. Our findings suggest that tantalum oxide as an n-type semiconductor with a calculated carrier density of ~7 × 1018/cm3 in amorphous Ta2O5 films, is a potentially competitive candidate for an electron transport material in perovskite solar cells.
Hetero Face-to-Face Porphyrin Array with Cooperative Effects of Coordination and Host–Guest Complexation
Publisher: Wiley
Date: 03-07-2017
Abstract: We successfully synthesized a hetero face-to-face porphyrin array composed of ZnTPP and RuTPP(DABCO)
Liquid Crystallinity as a Self‐Assembly Motif for High‐Efficiency, Solution‐Processed, Solid‐State Singlet Fission Materials
Publisher: Wiley
Date: 09-07-2019
Photo-excitation intensity dependent electron and hole injections from lead iodide perovskite to nanocrystalline TiO2 and spiro-OMeTAD
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CC06518F
Abstract: Quantitative assessment of photo-excitation intensity dependent electron and hole injections from CH 3 NH 3 PbI 3 perovskite to nanocrystalline TiO 2 and spiro-OMeTAD.
Origin of surface trap states in CdS quantum dots: relationship between size dependent photoluminescence and sulfur vacancy trap states
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CP04761C
Abstract: Trap state emission mainly originates from deep trapped electrons at surface Cd with sulfur vacancy sites of CdS quantum dot.
Developing sustainable, high-performance perovskites in photocatalysis: design strategies and applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CS00684C
Abstract: Recent progress of earth-abundant, nontoxic perovskite oxides, halides and oxyhalides for photocatalysis is discussed and related to composition and structure.
Near-Infrared Absorbing Cu12Sb4S13 and Cu3SbS4 Nanocrystals: Synthesis, Characterization, and Photoelectrochemistry
Publisher: American Chemical Society (ACS)
Date: 23-07-2013
DOI: 10.1021/JA402702X
Abstract: Herein, we present the novel synthesis of tetrahedrite copper antimony sulfide (CAS) nanocrystals (Cu12Sb4S13), which display strong absorptions in the visible and NIR. Through ligand tuning, the size of the Cu12Sb4S13 NCs may be increased from 6 to 18 nm. Phase purity is achieved through optimizing the ligand chemistry and maximizing the reactivity of the antimony precursor. We provide a detailed investigation of the optical and photoelectrical properties of both tetrahedrite (Cu12Sb4S13) and famatinite (Cu3SbS4) NCs. These NCs were found to have very high absorption coefficients reaching 10(5) cm(-1) and band gaps of 1.7 and 1 eV for tetrahedrite and famatinite NCs, respectively. Ultraviolet photoelectron spectroscopy was employed to determine the band positions. In each case, the Fermi energies reside close to the valence band, indicative of a p-type semiconductor. Annealing of tetrahedrite CAS NC films in sulfur vapor at 350 °C was found to result in pure famatinite NC films, opening the possibility to tune the crystal structure within thin films of these NCs. Photoelectrochemistry of hydrazine free unannealed films displays a strong p-type photoresponse, with up to 0.1 mA/cm(2) measured under mild illumination. Collectively these optical properties make CAS NCs an excellent new candidate for both thin film and hybrid solar cells and as strong NIR absorbers in general.
Monodisperse and size-tunable PbS colloidal quantum dots via heterogeneous precursors
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6TC05329G
Abstract: Monodisperse and size-tunable PbS QDs were synthesized via the diffusion controlled reaction of turbid suspensions of reactive N , N ′-diphenylthiourea and PbCl 2 precursors.
Dye-Sensitized Solar Cells Based on WO3
Publisher: American Chemical Society (ACS)
Date: 21-12-2010
DOI: 10.1021/LA103692Y
Abstract: In research on alternative photoanode materials for dye-sensitized solar cells (DSCs), there is rarely any report on WO(3), probably due to its acidic surface and more positive (vs NHE) conduction band edge position compared to TiO(2) and ZnO. For the first time, dye-sensitized solar cells based on porous WO(3) nanoparticle films were successfully fabricated with efficiency of up to 0.75%. The multicrystalline structure of WO(3) was examined by Raman spectroscopy and X-ray diffraction analysis. It was found that significant performance enhancement can be obtained from treating the WO(3) nanoparticle film with TiCl(4) the TiCl(4)-treated WO(3) DSCs were recorded with efficiency reaching 1.46%.
The Performance-determining Role of Lewis Bases in Dye-Sensitized Solar Cells Employing Copper-Bisphenanthroline Redox Mediators
Publisher: Wiley
Date: 02-09-2020
Indium tin oxide as a semiconductor material in efficient p-type dye-sensitized solar cells
Publisher: Springer Science and Business Media LLC
Date: 09-2016
DOI: 10.1038/AM.2016.89
Application of the Tris(acetylacetonato)iron(III)/(II) Redox Couple in p‐Type Dye‐Sensitized Solar Cells
Publisher: Wiley
Date: 28-01-2015
Abstract: An electrolyte based on the tris(acetylacetonato)iron(III)/(II) redox couple ([Fe(acac)3](0/1-)) was developed for p-type dye-sensitized solar cells (DSSCs). Introduction of a NiO blocking layer on the working electrode and the use of chenodeoxycholic acid in the electrolyte enhanced device performance by improving the photocurrent. Devices containing [Fe(acac)3](0/1-) and a perylene-thiophene-triphenylamine sensitizer (PMI-6T-TPA) have the highest reported short-circuit current (J(SC)=7.65 mA cm(-2)), and energy conversion efficiency (2.51%) for p-type DSSCs coupled with a fill factor of 0.51 and an open-circuit voltage V(OC)=645 mV. Measurement of the kinetics of dye regeneration by the redox mediator revealed that the process is diffusion limited as the dye-regeneration rate constant (1.7×10(8) M(-1) s(-1)) is very close to the maximum theoretical rate constant of 3.3×10(8) M(-1) s(-1). Consequently, a very high dye-regeneration yield (>99%) could be calculated for these devices.
Insulated conjugated bimetallopolymer with sigmoidal response by dual self-controlling system as a biomimetic material
Publisher: Springer Science and Business Media LLC
Date: 21-01-2020
DOI: 10.1038/S41467-019-14271-2
Abstract: Biological systems are known to spontaneously adjust the functioning of neurotransmitters, ion channels, and the immune system, being promoted or regulated through allosteric effects or inhibitors, affording non-linear responses to external stimuli. Here we report that an insulated conjugated bimetallopolymer, in which Ru(II) and Pt(II) complexes are mutually connected with insulated conjugations, exhibits phosphorescence in response to CO gas. The net profile corresponds to a sigmoidal response with a dual self-controlling system, where drastic changes were exhibited at two threshold concentrations. The first threshold for activation of the system is triggered by the depolymerization of the non-radiative conjugated polymer to luminescent monomers, while the second one for regulation is triggered by the switch in the rate-determining step of the Ru complex. Such a molecular design with cooperative multiple transition metals would provide routes for the development of higher-ordered artificial molecular systems bearing bioinspired responses with autonomous modulation.
Dominating Energy Losses in NiO p-Type Dye-Sensitized Solar Cells
Publisher: Wiley
Date: 14-11-2015
Photoinduced Charge Carrier Dynamics of Metal Chalcogenide Semiconductor Quantum Dot Sensitized TiO<sub>2</sub> Film for Photovoltaic Application
Publisher: Technical Association of Photopolymers, Japan
Date: 11-06-2021
Excitation Wavelength Dependent Interfacial Charge Transfer Dynamics in a CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Film
Publisher: Technical Association of Photopolymers, Japan
Date: 25-06-2018
Influence of Hole Mobility on Charge Separation and Recombination Dynamics at Lead Halide Perovskite and Spiro-OMeTAD Interface
Publisher: Technical Association of Photopolymers, Japan
Date: 24-06-2019
Primary photocatalytic water reduction and oxidation at an anatase TiO2 and Pt-TiO2 nanocrystalline electrode revealed by quantitative transient absorption studies
Publisher: Elsevier BV
Date: 11-2021
Complementary Color Tuning by HCl via Phosphorescence-to-Fluorescence Conversion on Insulated Metallopolymer Film and Its Light-Induced Acceleration
Publisher: MDPI AG
Date: 20-01-2020
Abstract: An insulated metallopolymer that undergoes phosphorescence-to-fluorescence conversion between complementary colors by an acid-stimulus is proposed as a color-tunable material. A Pt-based phosphorescent metallopolymer, where the conjugated polymeric backbone is insulated by a cyclodextrin, is depolymerized by HCl via acidic cleavage of Pt-acetylide bonds to form a fluorescent monomer. The insulation enables phosphorescence-to-fluorescence conversion to take place in the solid film. Rapid color change was achieved by accelerating the reaction between the metallopolymer and HCl by UV irradiation. These approaches are expected to provide new guidelines for the development of next-generation color-tunable materials and printable sensors based on precise molecular engineering.
Fluorene–Thiophene Copolymer Wire on TiO2: Mechanism Achieving Long Charge Separated State Lifetimes
Publisher: American Chemical Society (ACS)
Date: 10-11-2017
Identifying an Optimum Perovskite Solar Cell Structure by Kinetic Analysis: Planar, Mesoporous Based, or Extremely Thin Absorber Structure
Publisher: American Chemical Society (ACS)
Date: 06-07-2018
Dye-Anchoring Functional Groups on the Performance of Dye-Sensitized Solar Cells: Comparison between Alkoxysilyl and Carboxyl Groups
Publisher: American Chemical Society (ACS)
Date: 26-11-2014
DOI: 10.1021/JP5088338
Light Intensity Dependence of Performance of Lead Halide Perovskite Solar Cells
Publisher: Technical Association of Photopolymers, Japan
Date: 2017
Related Organisations
No related organisations have been discovered for Yasuhiro Tachibana.
Related Funding Activities
Discovery Projects - Grant ID: DP180103815
Start Date: 02-2018
End Date: 12-2022
Amount: $402,934.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE140100104
Start Date: 2014
End Date: 12-2014
Amount: $500,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE170100235
Start Date: 07-2017
End Date: 03-2020
Amount: $388,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE200100051
Start Date: 2020
End Date: 05-2022
Amount: $755,000.00
Funder: Australian Research Council
View Funded Activity