ORCID Profile
0000-0003-0379-1816
Current Organisations
Flinders University
,
University of South Australia
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Publisher: American Chemical Society (ACS)
Date: 22-12-2022
Publisher: Wiley
Date: 20-11-2021
Abstract: In polymer‐based organic photovoltaic cells, the capability of charge extraction/injection of molybdenum trioxide (MoO 3 ) is demonstrated as interface layer for polymer bulk heterojunction (BHJ). The present work determines the dipole formed at the MoO 3 and conjugated poly [2,3‐bis (3‐octyloxyphenyl) quinoxaline‐5,8‐diyl‐alt‐thiophene‐2,5‐diyl] (TQ1):(6,6)‐Phenyl C71 butyric acid methyl ester (PC 71 BM) bulk heterojunction interface. This dipole has a major influence on the charge transport across the TQ1:PC 71 BM interface. The formation of the dipole is determined with electron spectroscopy and the depth profiling technique neutral impact collision ion scattering spectroscopy. Metastable induced electron and UV‐photoelectron spectroscopy is applied to determine the enclosed surface coverage of minimum 1.5 nm MoO 3 and a maximized dipole strength of 2.4 eV with nm MoO 3 deposition on BHJ. It is also demonstrated that the air exposure reduces the dipole at the interface and leads to a decrease in cell performance providing evidence that the dipole formed at the interface is beneficial for the functioning of photovoltaic cells. The results indicate that the reduction in dipole might not be the only mechanism leading to cell performance degradation. The findings of the present work have relevance for other BHJ systems because MoO 3 as high work function material is likely to interact with other organic materials in a similar way.
Publisher: American Chemical Society (ACS)
Date: 16-06-2020
Publisher: Elsevier BV
Date: 06-2021
Publisher: Wiley
Date: 31-01-2020
Publisher: IOP Publishing
Date: 07-2010
Publisher: Wiley
Date: 08-2020
Publisher: Elsevier BV
Date: 07-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA05699A
Abstract: Bromide-containing long alkylammonium chain organic cations effectly passivate defects on 1.72 eV perovskite film surfaces and greatly enhance both the performance and stability of perovskite solar cells.
Publisher: Wiley
Date: 17-11-2020
Abstract: Dimensional engineering of perovskite solar cells has attracted significant research attention recently because of the potential to improve both device performance and stability. Here, a novel 2D passivation scheme for 3D perovskite solar cells is demonstrated using a mixed cation composition of 2D perovskite based on two different isomers of butylammonium iodide. The dual‐cation 2D perovskite outperforms its single cation 2D counterparts in surface passivation quality, resulting in devices with an impressive open‐circuit voltage of 1.21 V for a perovskite composition with an optical bandgap of ≈1.6 eV, and a ch ion efficiency of 23.27%. Using a combination of surface elemental analysis and valence electron spectra decomposition, it is shown that an in situ interaction between the 2D perovskite precursor and the 3D active layer results in surface intermixing of 3D and 2D perovskite phases, providing an effective combination of defect passivation and enhanced charge transfer, despite the semi‐insulating nature of the 2D perovskite phase. The demonstration of the synergistic interaction of multiple organic spacer cations in a 2D passivation layer offers new opportunities for further enhancement of device performance with mixed dimensional perovskite solar cells.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 07-12-2018
Abstract: A minimalist approach to integration yields tandem solar cells with high efficiency.
Publisher: American Chemical Society (ACS)
Date: 20-01-2022
Publisher: Wiley
Date: 19-12-2017
Publisher: American Chemical Society (ACS)
Date: 13-01-2023
Publisher: MDPI AG
Date: 16-09-2022
DOI: 10.3390/NANO12183218
Abstract: Radio frequency (RF) magnetron sputtering allows the fabrication of TiO2 films with high purity, reliable control of film thickness, and uniform morphology. In the present study, the change in surface roughness upon heating two different thicknesses of RF sputter-deposited TiO2 films was investigated. As a measure of the process of the change in surface morphology, chemically -synthesised phosphine-protected Au9 clusters covered by a photodeposited CrOx layer were used as a probe. Subsequent to the deposition of the Au9 clusters and the CrOx layer, s les were heated to 200 ℃ to remove the triphenylphosphine ligands from the Au9 cluster. After heating, the thick TiO2 film was found to be mobile, in contrast to the thin TiO2 film. The influence of the mobility of the TiO2 films on the Au9 clusters was investigated with X-ray photoelectron spectroscopy. It was found that the high mobility of the thick TiO2 film after heating leads to a significant agglomeration of the Au9 clusters, even when protected by the CrOx layer. The thin TiO2 film has a much lower mobility when being heated, resulting in only minor agglomeration of the Au9 clusters covered with the CrOx layer.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0NA00927J
Abstract: A method is presented for the deposition of gold clusters onto reduced graphene oxide, without aggregation of the gold clusters.
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 10-2009
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 09-2021
Publisher: Wiley
Date: 03-02-2020
Publisher: AIP Publishing
Date: 26-10-2021
DOI: 10.1063/5.0059912
Abstract: The properties of semiconductor surfaces can be modified by the deposition of metal clusters consisting of a few atoms. The properties of metal clusters and of cluster-modified surfaces depend on the number of atoms forming the clusters. Deposition of clusters with a monodisperse size distribution thus allows tailoring of the surface properties for technical applications. However, it is a challenge to retain the size of the clusters after their deposition due to the tendency of the clusters to agglomerate. The agglomeration can be inhibited by covering the metal cluster modified surface with a thin metal oxide overlayer. In the present work, phosphine-protected Au clusters, Au9(PPh3)8(NO3)3, were deposited onto RF-sputter deposited TiO2 films and subsequently covered with a Cr2O3 film only a few monolayers thick. The s les were then heated to 200 °C to remove the phosphine ligands, which is a lower temperature than that required to remove thiolate ligands from Au clusters. It was found that the Cr2O3 covering layer inhibited cluster agglomeration at an Au cluster coverage of 0.6% of a monolayer. When no protecting Cr2O3 layer was present, the clusters were found to agglomerate to a large degree on the TiO2 surface.
Publisher: American Chemical Society (ACS)
Date: 03-12-2020
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 09-2021
Publisher: Wiley
Date: 18-11-2017
Abstract: A robust solution phase ligand exchange system for lead sulfide (PbS) quantum dots (QDs) in the presence of Pb-thiolate ligands is presented that can better preserve the excitonic absorption and emission features as compared to the conventional ligands. The photoluminescence after ligand exchange of PbS QDs with Pb-thiolate ligand is preserved up to 78% of the original oleate capped PbS QDs.
Publisher: American Chemical Society (ACS)
Date: 11-12-2020
Publisher: Springer Science and Business Media LLC
Date: 20-03-2010
Publisher: Elsevier BV
Date: 2023
Publisher: American Medical Association (AMA)
Date: 11-04-2011
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 2022
Publisher: Wiley
Date: 18-12-2020
Publisher: Wiley
Date: 27-11-2020
Publisher: American Chemical Society (ACS)
Date: 12-03-2023
Publisher: Elsevier BV
Date: 03-2023
Publisher: Elsevier BV
Date: 11-2022
Publisher: Elsevier BV
Date: 04-2021
Publisher: Wiley
Date: 11-08-2021
Abstract: Dimensional engineering of perovskite films is a promising pathway to improve the efficiency and stability of perovskite solar cells (PSCs). In this context, surface or bulk passivation of defects in 3D perovskite film by careful introduction of 2D perovskite plays a key role. Here the authors demonstrate a 2D perovskite passivation scheme based on octylammonium chloride, and show that it provides both bulk and surface passivation of 1.6 eV bandgap 3D perovskite film for highly efficient (≈23.62%) PSCs with open‐circuit voltages up to 1.24 V. Surface and depth‐resolved microscopy and spectroscopy analysis reveal that the Cl − anion diffuses into the perovskite bulk, passivating defects, while the octylammonium ligands provide effective, localized surface passivation. The authors find that the Cl − diffusion into the perovskite lattice is independent of the 2D perovskite crystallization process and occurs rapidly during deposition of the 2D precursor solution. The annealing‐induced evaporation of Cl from bulk perovskite is also inhibited in 2D–3D perovskite film as compared to pristine 3D perovskite, ensuring effective bulk passivation in the relevant film.
Publisher: Wiley
Date: 18-04-2018
Publisher: American Chemical Society (ACS)
Date: 22-11-2018
Abstract: MoO
Publisher: Wiley
Date: 25-09-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CC01555A
Abstract: A polymer made from sulfur and canola oil can be used as an oil spill sorbent and then repurposed into a sulfur-rich graphitic carbon for mercury removal from water.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8NR08195F
Abstract: Self-assembled monolayers of iodo-perfluoro alkanes are shown to form on silica surfaces, guided by halogen bonding.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2PY00903J
Abstract: A magnetic responsive composite was made from a sulfur-rich polymer and iron nanoparticles. Diverse applications in mercury remediation, microwave curing, and magnetic responsive actuators were demonstrated.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CP02283K
Abstract: Surface defects influence the dye adsorption on TiO 2 used as a substrate in dye-sensitized solar cells (DSSCs).
Publisher: American Chemical Society (ACS)
Date: 07-12-2017
Publisher: Wiley
Date: 16-08-2022
Abstract: Passivating contacts based on transition metal oxides (TMOs) have the potential to overcome existing performance limitations in high‐efficiency crystalline silicon (c‐Si) solar cells, which is a significant driver for continuing cost/Watt reductions of photovoltaic electricity. Herein, innovative stacks of Al‐alloyed TiO x (Al y TiO x ) and pure TiO x as transparent electron‐selective passivating contacts for n‐type c‐Si surfaces are explored. An optimized stack of 2 nm Al y TiO x and 2 nm TiO x is shown to provide both record‐quality surface passivation and excellent electrical contact, with a surface recombination current density prefactor J 0 of 2.4 fA cm −2 and a specific contact resistivity ρ c of 15.2 mΩ cm 2 . The performance of this innovative stack significantly exceeds previously reported values for pure or doped TiO x single layers, SiO x /TiO x stacks, a‐Si:H/TiO x stacks, and other transparent contact technologies. Furthermore, an excellent efficiency of 21.9% is attained by incorporating the optimized stack as a full‐area rear contact in an n‐type c‐Si solar cell. The findings set a new benchmark for the passivation performance of metal oxide‐based passivating contacts, bringing it to a level on par with state‐of‐the‐art SiO x oly‐Si contacts while greatly improving optical transparency.
Publisher: Elsevier BV
Date: 2022
DOI: 10.2139/SSRN.4021951
Publisher: Frontiers Media SA
Date: 14-08-2020
Publisher: Wiley
Date: 26-05-2022
Abstract: One of the important factors in the performance of perovskite solar cells (PSCs) is effective defect passivation. Dimensional engineering technique is a promising method to efficiently passivate non‐radiative recombination pathways in the bulk and surface of PSCs. Herein, a passivation approach for the perovskite/hole transport layer interface is presented, using a mixture of guanidinium and n‐octylammonium cations introduced via GuaBr and n‐OABr. The dual‐cation passivation layer can provide an open‐circuit voltage of 1.21 V with a power conversion efficiency of 23.13%, which is superior to their single cation counterparts. The mixed‐cation passivation layer forms a 1D/2D perovskite film on top of 3D perovskite, leading to a more hydrophobic and smoother surface than the uncoated film. A smooth surface can diminish non‐radiative recombination and enhance charge extraction at the interface making a better contact with the transport layer, resulting in improved short‐circuit current. In addition, space charge‐limited current measurements show a three times reduction in the trap‐filled limit voltage in the mixed‐cation passivated s le compared with unpassivated cells, indicating fewer trapped states. The shelf‐life stability test in ambient atmosphere with 60% relative humidity as well as light‐soaking stability reveal the highest stability for the dual‐cation surface passivation.
No related grants have been discovered for Yanting Yin.