材料科学
响应度
三元运算
光电探测器
红外线的
量子效率
光电流
光电子学
光学
物理
计算机科学
程序设计语言
作者
Liang Li,Weike Wang,Lin Gan,Nan Zhou,Xiangde Zhu,Qi Zhang,Huiqiao Li,Mingliang Tian,Tianyou Zhai
标识
DOI:10.1002/adfm.201603804
摘要
Multielemental systems enable the use of multiple degrees of freedom for control of physical properties by means of stoichiometric variation. This has attracted extremely high interest in the field of 2D optoelectronics in recent years. Here, for the first time, multilayer 2D ternary Ta 2 NiSe 5 flakes are successfully fabricated using a mechanical exfoliation method from chemical vapor transport synthesized high quality bulk and the optoelectronic properties are systematically investigated. Importantly, a high responsivity of 17.21 A W −1 and high external quantum efficiency of 2645% are recorded from an as‐fabricated photodetector at room temperature in air; this is superior to most other 2D materials‐based photodetectors that have been reported. More intriguingly, a usual sublinear and an unusual superlinear light‐intensity‐dependent photocurrent are observed under air and vacuum, respectively. These excellent and special properties make multilayer ternary Ta 2 NiSe 5 a highly competitive candidate for future infrared optoelectronic applications and an interesting platform for photophysics studies.
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