王照奎教授课题组在adv. mater.上发表论文-k8凯发赢家一触即发

作者：

jing chen¹, zhen-huang su², bin song¹, kai-li wang¹, qiang lv¹, chun-hao chen¹, yu xia¹, lei huang¹, and zhao-kui wang¹*

单位：

¹institute of functional nano & soft materials (funsom), jiangsu key laboratory of advanced negative carbon technologies soochow university, suzhou 215123, china

²shanghai synchrotron radiation facility, shanghai advanced research institute, shanghai institute of applied physics chinese academy of sciences shanghai 201204, china

摘要：

formamidinium lead iodide (fapbi₃) perovskite films, ensuring optically active phase purity with uniform crystal orientation, are ideal for photovoltaic applications. however, the optically active α-fapbi₃ phase is easy to degrade into δ-phase due to numerous defects within randomly oriented films. here, a “quasi-2d” perovskite template is pre-deposited on the film surface within the crystallization process based on the two-step preparation technology, which directly induced pure and highly orientated crystallization of α-fapbi₃ across the downward growth process. furthermore, the enlarged interaction between 2d components with colloidal properties and lead iodide delayed the crystallization process effectively, yielding high crystallinity with low trap state density. the resulting perovskite photovoltaic devices exhibited a champion efficiency as high as 25.79% with comprehensively improved device stability. this work provides new insights into the utilization of 2d components and the formation mechanism behind 2d perovskites.

影响因子：

27.4

分区情况：

一区

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