Vacuum-Controlled Growth of CsPbIBr for Highly Efficient and Stable All-Inorganic Perovskite Solar Cells.
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2020
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Abstract
A high-temperature annealing process (>250 °C) is always needed to obtain high-quality α-CsPbIBr perovskite films, which makes it a challenge in the manufacture and application of flexible photovoltaic devices. In this work, a vacuum-controlled growth (VCG) method that can effectively control the crystallization of perovskite and provide high-quality films with larger grain size and low defect density at a lower temperature is demonstrated. Besides, a facile introduction of polyethyleneimine ethoxylated (PEIE) interlayer improves the charge extraction and suppresses the carrier recombination. Therefore, the power conversion efficiency (PCE) of an all-inorganic CsPbIBr perovskite solar cell (PSC) reaches 12.32%. The unencapsulated PSCs with VCG treatment and PEIE modification show outstanding stabilities while retaining over 95% of the initial PCE after being stored in a N glovebox for 1000 h. This low-temperature crystallization method and cheap interlayer introduction can drive the development of future commercialization of all-inorganic perovskite solar cells.
| Reference Key |
wang2020vacuumcontrolledacs
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| Authors | Wang, Tianyi;Yang, Yifan;Zhang, Yu;Nian, Li;Wang, Peng;Qian, Yinping;Rong, Qikun;Zhou, Guofu;Li, Na; |
| Journal | ACS applied materials & interfaces |
| Year | 2020 |
| DOI |
10.1021/acsami.0c01583
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