光电探测器
响应度
材料科学
光电子学
钙钛矿(结构)
纳米棒
带材弯曲
比探测率
兴奋剂
纳米技术
化学工程
工程类
作者
Fengren Cao,Linxing Meng,Meng Wang,Wei Tian,Liang Li
标识
DOI:10.1002/adma.201806725
摘要
Self-powered photodetectors are highly desired to meet the great demand in applications of sensing, communication, and imaging. Manipulating the carrier separation and recombination is critical to achieve high performance. In this paper, a self-powered photodetector based on the integrated gradient O-doped CdS nanorod array and perovskite is presented. Through optimizing the degree of continuous built-in band bending in the gradient-O CdS, the photodetector demonstrates a remarkable detectivity of 2.1 × 1013 Jones. Under the self-powered voltage mode, the responsivity can be as high as 0.48 A W-1 , and the rise and decay time are 0.54/2.21 ms. The comprehensive performance is comparable and even better than reported perovskite and other types of self-powered photodetectors. The improved mechanism reveals that the gradient band bending promotes the photogenerated carrier transfer and hinders the recombination at the interface.
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