Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
Publication date: 30th March 2023
Perovskite solar cells (PSCs) are well known for their efficiency, with a record efficiency of 25.7%. Although PSCs have excellent performance, their instability with respect to environmental factors such as moisture, heat, and radiation is a barrier for their commercialization. Out of the various approaches to improving cell stability, composition engineering is one of the most effective.[1] The state-of-the-art perovskite composition, Cs0.05FA0.83MA0.17Pb(I0.83Br0.17)3 is both efficient and thermally stable.[2] In this study we used different perovskite compositions (MAPbI3, FA0.85MA0.15Pb(I0.85Br0.15)3, and Cs0.05FA0.83MA0.17Pb(I0.83Br0.17)3) in both inverse and regular architectures, to study the operational stability of PSCs under humid conditions. We exposed the devices to either 0%, 40%, or 80% relative humidity (RH) and performed operando grazing incidence wide angle X-ray scattering (GIWAXS) measurements. The results show inverted architecture devices are more stable in comparison to the regular architecture because of the interlayers used. MAPbI3 as an active layer, in inverted devices, exhibited S-shaped JV curves at 80% RH; the S-shaped curves disappeared when the system was purged to 0%RH. This is attributed to charge accumulation at the interface during operation under high humidity and self-recovery on drying. The results of this study will benefit the development and commercialization of PSC technology.
The Natural Sciences and Engineering Research Council of Canada (NSERC, Grant RGPIN-2022-03138) and the University of Saskatchewan are acknowledged for financial support. Research described was performed at the Canadian Light Source, which is supported by the Canada Foundation for Innovation, NSERC, the University of Saskatchewan, the Government of Saskatchewan, Western Economic Diversification Canada, the National Research Council Canada, and the Canadian Institutes of Health Research. Technical support from BXDS beamline scientist Dr. Adam Leontowich is gratefully acknowledged.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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