Perovskite/silicon tandem cell manufactured by directly depositing SnO2 on TOPCon silicon cell in CBD method
Jiyeon Hyun a, Kyung Mun Yeom b, Ha Eun Lee a, Donghwan Kim a, Hae-Seok Lee c, Yoonmook Kang c
a Department of Materials Science and Engineering, Korea University, Korea
b Korea University, Korea, Republic of
c KU-KIST Green School Graduate School of Energy and Environment, Korea University, Korea
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
Poster, Jiyeon Hyun, 200
Publication date: 20th April 2022

The efficiency of single-junction solar cells is rapidly approaching the theoretical limit of efficiency. One of the ways to overcome the theoretical efficiency limit is a multi-junction solar cell. Tandem solar cells, based on perovskite and crystalline silicon absorbers, are promising candidates for commercial applications. Tin oxide (SnO2), applied via the spin-coating method, has been among the most used electron transfer layers in normal (n-i-p) perovskite/silicon tandem cells. SnO2 synthesized by chemical bath deposition (CBD) has not yet been applied in tandem devices. This method shows improved efficiency in perovskite single cells and allows for deposition over a larger area. Our study is the first to apply low-temperature processed SnO2 via CBD to a homojunction silicon solar cell without additional deposition of a recombination layer. By controlling the reaction time, a tandem efficiency of 16.9% was achieved. This study shows that tandem implementation is possible through the CBD method, and demonstrates the potential of this method in commercial application to textured silicon surfaces with large areas.

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