材料科学
钙钛矿(结构)
降级(电信)
碘化物
化学工程
太阳能电池
光化学
无机化学
光电子学
化学
计算机科学
电信
工程类
作者
Ganbaatar Tumen‐Ulzii,Chuanjiang Qin,Dino Klotz,Matthew R. Leyden,Pangpang Wang,Morgan Auffray,Takashi Fujihara,Toshinori Matsushima,Jin Wook Lee,Sung Joon Lee,Yang Yang,Chihaya Adachi
标识
DOI:10.1002/adma.201905035
摘要
Abstract Excess/unreacted lead iodide (PbI 2 ) has been commonly used in perovskite films for the state‐of‐the‐art solar cell applications. However, an understanding of intrinsic degradation mechanisms of perovskite solar cells (PSCs) containing unreacted PbI 2 has been still insufficient and, therefore, needs to be clarified for better operational durability. Here, it is shown that degradation of PSCs is hastened by unreacted PbI 2 crystals under continuous light illumination. Unreacted PbI 2 undergoes photodecomposition under illumination, resulting in the formation of lead and iodine in films. Thus, this photodecomposition of PbI 2 is one of the main reasons for accelerated device degradation. Therefore, this work reveals that carefully controlling the formation of unreacted PbI 2 crystals in perovskite films is very important to improve device operational stability for diverse opto‐electronic applications in the future.
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