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Low Temperature Fabrication for High Performance Flexible CsPbI2Br Perovskite Solar Cells
Advanced Science ( IF 14.3 ) Pub Date : 2018-09-15 , DOI: 10.1002/advs.201801117
Hong Jiang 1 , Jiangshan Feng 1 , Huan Zhao 1 , Guijun Li 2 , Guannan Yin 1 , Yu Han 1 , Feng Yan 2 , Zhike Liu 1 , Shengzhong Frank Liu 1, 3
Affiliation  

All‐inorganic CsPbX3‐based perovskites, such as CsPbI2Br, show much better thermal and illumination stability than their organic–inorganic hybrid counterparts. However, fabrication of high‐quality CsPbI2Br 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 CsPbI2Br 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 CsPbI2Br 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 CsPbI2Br solar cells fabricated at low temperature (120 °C). In addition, the method enables fabrication of flexible CsPbI2Br 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 CsPbX3‐based perovskite solar cells (PSCs) at low temperature, particularly for flexible ones.

中文翻译:

高性能柔性 CsPbI2Br 钙钛矿太阳能电池的低温制造

全无机 CsPbX 3基钙钛矿,例如 CsPbI 2 Br,比有机-无机杂化钙钛矿表现出更好的热稳定性和光照稳定性。然而,高质量CsPbI 2 Br钙钛矿薄膜的制造通常需要在与塑料基板不相容的高温(>250°C)下进行退火。在这项工作中,路易斯碱加合物促进的生长过程使得在低温下制造高质量的CsPbI 2 Br钙钛矿薄膜成为可能。该机制归因于合成的二甲基亚砜(DMSO)加合物,其允许在热退火处理期间以低活化能途径形成CsPbI 2 Br钙钛矿薄膜。功率转换效率(PCE)达到13.54%。据了解,这是在低温(120℃)下制造的CsPbI 2 Br太阳能电池的最高效率。此外,该方法能够制造柔性CsPbI 2 Br PSC,PCE高达11.73%。令人惊讶的是,没有任何封装的裸器件在环境空气中存储 700 小时后仍保持其原始 PCE 的 70%。这项工作提供了一种在低温下制备其他高性能CsPbX 3基钙钛矿太阳能电池(PSC)的方法,特别是柔性太阳能电池。
更新日期:2018-09-15
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