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Greenbank, William
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Tuning surface defect states in sputtered titanium oxide electron transport layers for enhanced stability of organic photovoltaicscitations
- 2024Tuning surface defect states in sputtered titanium oxide electron transport layers for enhanced stability of organic photovoltaicscitations
- 2024Tuning Surface Defect States in Sputtered Titanium Oxide Electron Transport Layers for Enhanced Stability of Organic Photovoltaicscitations
- 2024Surfactant-Modified Nanocomposite Thin-Film Capacitors
- 2024Developing Novel Self Healable Capacitor Materials with Improved Thermostability
- 2023Power Capacitors – state of the art technology review and an outlook into the future
- 2023Nanoscale thinning of metal-coated polypropylene films by Helium-ion irradiation
- 2023Nanoscale thinning of metal-coated polypropylene films by Helium-ion irradiation
- 2023Composite dielectric capacitors with chemically functionalized BaTiO3 nanoparticles
- 2023Composite dielectric capacitors with chemically functionalized BaTiO3 nanoparticles
- 2022Layer-by-layer printable nano-scale polypropylene for precise control of nanocomposite capacitor dielectric morphologies in metallised film capacitorscitations
- 2022Layer-by-layer Printed Dielectrics
- 2022Layer-by-layer Printed Dielectrics:Scalable Nanocomposite Capacitor Fabrication for the Green Transition
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article
Tuning surface defect states in sputtered titanium oxide electron transport layers for enhanced stability of organic photovoltaics
Abstract
<p>Nonfullerene acceptors (NFAs) have dramatically improved the power conversion efficiency (PCE) of organic photovoltaics (OPV) in recent years; however, their device stability currently remains a bottleneck for further technological progress. Photocatalytic decomposition of nonfullerene acceptor molecules at metal oxide electron transport layer (ETL) interfaces has in several recent reports been demonstrated as one of the main degradation mechanisms for these high-performing OPV devices. While some routes for mitigating such degradation effects have been proposed, e.g., through a second layer integrated on the ETL surface, no clear strategy that complies with device scale-up and application requirements has been presented to date. In this work, it is demonstrated that the development of sputtered titanium oxide layers as ETLs in nonfullerene acceptor based OPV can lead to significantly enhanced device lifetimes. This is achieved by tuning the concentration of defect states at the oxide surface, via the reactive sputtering process, to mitigate the photocatalytic decomposition of NFA molecules at the metal oxide interlayers. Reduced defect state formation at the oxide surface is confirmed through X-ray photoelectron spectroscopy (XPS) studies, while the reduced photocatalytic decomposition of nonfullerene acceptor molecules is confirmed via optical spectroscopy investigations. The PBDB-T:ITIC organic solar cells show power conversion efficiencies of around 10% and significantly enhanced photostability. This is achieved through a reactive sputtering process that is fully scalable and industry compatible.</p>