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- W2890589622 abstract "Abstract All‐inorganic CsPbX 3 ‐based perovskites, such as CsPbI 2 Br, show much better thermal and illumination stability than their organic–inorganic hybrid counterparts. However, fabrication of high‐quality CsPbI 2 Br perovskite film normally requires annealing at a high temperature (>250 °C) that is not compatible with the plastic substrate. In this work, a Lewis base adduct‐promoted growth process that makes it possible to fabricate high quality CsPbI 2 Br perovskite films at low temperature is promoted. The mechanism is attributed to synthesized dimethyl sulfoxide (DMSO) adducts which allow a low activation energy route to form CsPbI 2 Br perovskite films during the thermal annealing treatment. A power conversion efficiency (PCE) of 13.54% is achieved. As far as it is known, this is the highest efficiency for the CsPbI 2 Br solar cells fabricated at low temperature (120 °C). In addition, the method enables fabrication of flexible CsPbI 2 Br PSCs with PCE as high as 11.73%. Surprisingly, the bare devices without any encapsulation maintain 70% of their original PCEs after being stored in ambient air for 700 h. This work provides an approach for preparing other high performance CsPbX 3 ‐based perovskite solar cells (PSCs) at low temperature, particularly for flexible ones." @default.
- W2890589622 created "2018-09-27" @default.
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- W2890589622 date "2018-09-15" @default.
- W2890589622 modified "2023-10-11" @default.
- W2890589622 title "Low Temperature Fabrication for High Performance Flexible CsPbI<sub>2</sub> Br Perovskite Solar Cells" @default.
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- W2890589622 doi "https://doi.org/10.1002/advs.201801117" @default.
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