材料科学
结晶度
退火(玻璃)
钙钛矿(结构)
能量转换效率
光电子学
制作
薄膜
光伏
纳米技术
化学工程
复合材料
光伏系统
生物
工程类
生态学
病理
医学
替代医学
作者
Qi Song,Hongkang Gong,Fulin Sun,Ting Zhu,Chenhui Zhang,Mingxing Li,Fangtian You,Zhiqun He,Dan Li,Chunjun Liang
标识
DOI:10.1021/acsami.2c15181
摘要
During the fabrication of metal halide perovskite films, polycrystal growth and maturation are largely influenced by high-temperature annealing. However, this process would cause crystals to expand or contract at various depths in the film, leading to microscopic structural deformation and further altering the optoelectronic properties of the perovskite film. Herein, we propose an additional rinsing intermediate phase (RIP) strategy that involves precovering the perovskite film surface with a mixed organic layer prior to high-temperature annealing. The lattice distortion of the microscopic structure brought on by the driving force of the heat field is greatly reduced as a result of the modulation for the upper surface of the intermediate phase film by the rinse layer. This strategy can prepare films with high crystallinity, minor residual stresses, fewer defects, and overall film uniformity. As a result, the modified inverted perovskite solar cell (PSC) achieves a certified power conversion (PCE) of 22.76%. Meanwhile, since the rinse layer is involved in the entire crystal formation process, ion migration and buildup in the device are prevented between the interface. Consequently, the devices still retain 90% of their initial PCE, demonstrating enhanced operational stability after 500 h of operation. This method of modulating the intermediate perovskite state offers an investigation into improving the traditional method of making thin films, which is anticipated to hasten the commercialization of perovskite photovoltaics.
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