1. Oxidation-resistant all-perovskite tandem solar cells in substrate configuration.
- Author
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Wang, Yurui, Lin, Renxing, Wang, Xiaoyu, Liu, Chenshuaiyu, Ahmed, Yameen, Huang, Zilong, Zhang, Zhibin, Li, Hongjiang, Zhang, Mei, Gao, Yuan, Luo, Haowen, Wu, Pu, Gao, Han, Zheng, Xuntian, Li, Manya, Liu, Zhou, Kong, Wenchi, Li, Ludong, Liu, Kaihui, and Saidaminov, Makhsud I.
- Subjects
SOLAR cells ,PEROVSKITE ,PHOTOVOLTAIC power systems ,METAL foils ,COPPER foil ,ORDER picking systems ,TRADE routes - Abstract
The commonly-used superstrate configuration (depositing front subcell first and then depositing back subcell) in all-perovskite tandem solar cells is disadvantageous for long-term stability due to oxidizable narrow-bandgap perovskite assembled last and easily exposable to air. Here we reverse the processing order and demonstrate all-perovskite tandems in a substrate configuration (depositing back subcell first and then depositing front subcell) to bury oxidizable narrow-bandgap perovskite deep in the device stack. By using guanidinium tetrafluoroborate additive in wide-bandgap perovskite subcell, we achieve an efficiency of 25.3% for the substrate-configured all-perovskite tandem cells. The unencapsulated devices exhibit no performance degradation after storage in dry air for 1000 hours. The substrate configuration also widens the choice of flexible substrates: we achieve 24.1% and 20.3% efficient flexible all-perovskite tandem solar cells on copper-coated polyethylene naphthalene and copper metal foil, respectively. Substrate configuration offers a promising route to unleash the commercial potential of all-perovskite tandem solar cells. The superstate configuration in all-perovskite tandem solar cells is disadvantageous for long-term stability. Here, the authors reverse the processing order and demonstrate substrate configuration to bury oxidizable narrow-bandgap perovskites, and achieve efficiency of 25.3% with long stability. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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