材料科学
甲脒
卤化物
钙钛矿(结构)
结晶度
能量转换效率
化学工程
光电子学
无机化学
复合材料
化学
工程类
作者
Xiao Hu,Cheng Zhu,Wenjun Zhang,Haixin Wang,Jianan Wang,Fumeng Ren,Rui Chen,Sanwan Liu,Xin Meng,Jing Zhou,Yongyan Pan,Minghao Yin,Derun Sun,Shasha Zhang,Yiqiang Zhang,Zonghao Liu,Qi Chen,Wei Chen
出处
期刊:Nano Energy
[Elsevier]
日期:2022-07-12
卷期号:101: 107594-107594
被引量:25
标识
DOI:10.1016/j.nanoen.2022.107594
摘要
Residual lattice strain in halide perovskites has been recognized as a key factor that affects device efficiency and stability of perovskite solar cells (PSCs). Here, we reveal that the escape of organic ammonium halide and their inhomogeneous distribution after thermal annealing could cause severe residual strain in intrinsic thermal stable formamidinium-cesium (FACs) perovskite films. Thus, we develop an imprint-assisted organic ammonium halide compensation strategy for residual lattice strain relaxation. We demonstrate the residual lattice strain is well-released after post-treatment, along with further perovskite grain growth/coalescence, crystallinity improvement, and defect repair. As a result, the strain-free PSCs with nickel oxide based inverted architecture exhibit a power conversion efficiency as high as 21.30% and the corresponding encapsulated devices retain 98% of their initial efficiencies at 45 °C under 1-sun equivalent white-light light-emitting diode array illumination with maximum power point tracking in the ambient environment for 1000 h.
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