响应度
光电探测器
光电流
光电子学
材料科学
光子学
钙钛矿(结构)
圆极化
圆二色性
探测器
量子效率
光学
物理
化学
结晶学
微带线
作者
Tianjun Liu,Wei Shi,Weidong Tang,Zilu Liu,Bob C. Schroeder,Oliver Fenwick,Matthew J. Fuchter
出处
期刊:ACS Nano
[American Chemical Society]
日期:2022-02-02
卷期号:16 (2): 2682-2689
被引量:51
标识
DOI:10.1021/acsnano.1c09521
摘要
Circularly polarized light (CPL) has considerable technological potential, from quantum computing to bioimaging. To maximize the opportunity, high performance photodetectors that can directly distinguish left-handed and right-handed circularly polarized light are needed. Hybrid organic-inorganic perovskites containing chiral organic ligands are an emerging candidate for the active material in CPL photodetecting devices, but current studies suggest there to be a trade-off between the ability to differentially absorb CPL and photocurrent responsivity in chiral perovskites devices. Here, we report a CPL detector based on quasi two-dimensional (quasi-2D) chiral perovskite films. We find it is possible to generate materials where the circular dichroism (CD) is comparable in both 2D and quasi-2D films, while the responsivity of the photodetector improves for the latter. Given this, we are able to showcase a CPL photodetector that exhibits both a high dissymmetry factor of 0.15 and a high responsivity of 15.7 A W-1. We believe our data further advocates the potential of chiral perovskites in CPL-dependent photonic technologies.
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