卤化物
钙钛矿(结构)
光热治疗
材料科学
无定形固体
光电子学
化学工程
纳米技术
无机化学
化学
结晶学
工程类
作者
Zonglun Li,Binxia Jia,Sixue Fang,Quanjun Li,Fuyu Tian,Haiyan Li,Ran Liu,Yucheng Liu,Lijun Zhang,Shengzhong Liu,Bingbing Liu
标识
DOI:10.1002/advs.202205837
摘要
Abstract Effective modification of the structure and properties of halide perovskites via the pressure engineering strategy has attracted enormous interest in the past decade. However, sufficient effort and insights regarding the potential properties and applications of the high‐pressure amorphous phase are still lacking. Here, the superior and tunable photoelectric properties that occur in the pressure‐induced amorphization process of the halide perovskite Cs 3 Bi 2 I 9 are demonstrated. With increasing pressure, the photocurrent with xenon lamp illumination exhibits a rapid increase and achieves an almost five orders of magnitude increment compared to its initial value. Impressively, a broadband photoresponse from 520 to 1650 nm with an optimal responsivity of 6.81 mA W −1 and fast response times of 95/96 ms at 1650 nm is achieved upon successive compression. The high‐gain, fast, broadband, and dramatically enhanced photoresponse properties of Cs 3 Bi 2 I 9 are the result of comprehensive photoconductive and photothermoelectric mechanisms, which are associated with enhanced orbital coupling caused by an increase in BiI interactions in the [BiI 6 ] 3− cluster, even in the amorphous state. These findings provide new insights for further exploring the potential properties and applications of amorphous perovskites.
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