Interfacial Passivation Treatment towards High-efficiency and Operational Stable Perovskite Solar Cells
Bowen Yang a b, Jiajia Suo a b, Anders Hagfeldt a b
a Department of Chemistry-Angstrom, Uppsala University
b EPFL, Switzerland
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Oral, Bowen Yang, presentation 039
Publication date: 20th April 2022

Perovskite solar cells (PSCs) have achieved remarkable power conversion efficiencies (PCEs) of 25.7% on single-junction PSCs and 29.8% on perovskite-silicon tandem solar cells. Recently, scalability has also been well addressed by manipulating the perovskite crystal growth, investigation of device engineer as well as optimization of up-scaling techniques. However, the operational stability of the device is still not good enough to compete with other well-established PVs.

It is reported that degradation of the device always starts from the interfaces. Therefore, we are dedicated in designing and investigating different passivation materials as well as solvent engineering at the interface between the perovskite and hole transporting layer, in order to improve the device performance and most importantly, their operational stability. As a result, our target devices treated by various interfacial passivation materials delivered PCEs approaching 24% with excellent long-term stabilities, especially under maximum power point tracking of over 1500 h with retaining more than 96% of their initial PCEs.[1-4]

The projects have received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 764047 and from the Swiss National Science Foundation for financial support with Project No. 200020_185041.

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