Potentially temperature-resistant inorganic perovskite/silicon tandem solar cells (TSCs) are promising devices for boosting efficiency past the single-junction silicon limit. However, undesirable non-radiative recombination generally leads to a significant voltage deficit. Here, we introduce an effective strategy using nickel iodide, an inorganic halide salt, to passivate iodine vacancies and suppress non-radiative recombination. NiI2-treated CsPbI3-xBrx inorganic perovskite solar cells with a 1.80 eV bandgap exhibited an efficiency of 19.53% and a voltage of 1.36 V, corresponding to a voltage deficit of 0.44 V. Importantly, the treated device demonstrated excellent operational stability, maintaining 95.7% of its initial efficiency after maximum power point tracking for 300 h under continuous illumination in a N2 atmosphere. By combining this inorganic perovskite top cell with a narrower bandgap silicon bottom cell, we for the first time achieved monolithic inorganic perovskite/silicon TSCs, which exhibited an efficiency of 22.95% with an open-circuit voltage of 2.04 V. This work provides a promising strategy for using inorganic passivation materials to achieve efficient and stable solar cells.
WOS:001080902100001
2022-05-01
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Funder | Grant Number |
National Key Research and Devel-opment Program of China | 2018YFB1500103 |
National Key Research and Development Program of China | |
National Natural Science Foundation of China | 2018YFB1500103 |
Natural Science Foundation of Tianjin | U21A2072 |
China Postdoctoral Science Foundation | 20JCQNJC02070 |
Overseas Expertise Introduction Project for Discipline Innovation of Higher Education of China | 2020T130317 |
Tianjin Science and Technology Project | B16027 |
Key R & D Program of Hebei Province | 18ZXJMTG00220 |
Haihe Laboratory of Sustainable Chemical Transformations | 19214301D |
Fundamental Research Funds for the Central Universities, Nankai University | |