非活性 (PbI)RbCl 稳定钙钛矿薄膜，提高太阳能电池效率。
Inactive (PbI)RbCl stabilizes perovskite films for efficient solar cells.
机构信息
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, P.R. China, 100083.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049.
出版信息
Science. 2022 Jul 29;377(6605):531-534. doi: 10.1126/science.abp8873. Epub 2022 Jul 28.
In halide perovskite solar cells the formation of secondary-phase excess lead iodide (PbI) has some positive effects on power conversion efficiency (PCE) but can be detrimental to device stability and lead to large hysteresis effects in voltage sweeps. We converted PbI into an inactive (PbI)RbCl compound by RbCl doping, which effectively stabilizes the perovskite phase. We obtained a certified PCE of 25.6% for FAPbI (FA, formamidinium) perovskite solar cells on the basis of this strategy. Devices retained 96% of their original PCE values after 1000 hours of shelf storage and 80% after 500 hours of thermal stability testing at 85°C.
在卤化物钙钛矿太阳能电池中，形成过剩的碘化铅（PbI）的次要相具有一些对功率转换效率（PCE）的积极影响，但可能对器件稳定性有害，并导致电压扫描中的大滞后效应。我们通过 RbCl 掺杂将 PbI 转化为非活性（PbI）RbCl 化合物，这有效地稳定了钙钛矿相。在此基础上，我们获得了基于 FAPbI（FA，甲脒）钙钛矿太阳能电池的认证 PCE 为 25.6%。器件在货架储存 1000 小时后保留了其原始 PCE 值的 96%，在 85°C 的热稳定性测试 500 小时后保留了 80%。
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