光探测
光电探测器
暗电流
材料科学
光电子学
紫外线
响应时间
外延
氧气
光学
薄膜
钙钛矿(结构)
带隙
纳米技术
物理
化学
计算机科学
图层(电子)
计算机图形学(图像)
结晶学
量子力学
作者
Jinfu Zhang,Ningtao Liu,Tan Zhang,Shudong Hu,Simiao Wu,Wei Wang,Zilong Wang,Wenrui Zhang,Jichun Ye
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-09-23
卷期号:47 (19): 5044-5044
被引量:3
摘要
LaInO3 (LIO) represents a new, to the best of knowledge, type of perovskite oxides for deep-ultraviolet (DUV) photodetection owing to the wide bandgap nature (∼5.0 eV) and the higher tolerance of defect engineering for tunable carrier transport. Here we fabricate fast-response DUV photodetectors based on epitaxial LIO thin films and demonstrate an effective strategy for balancing the photodetector performance using the oxygen growth pressure as a simple control parameter. Increasing the oxygen pressure is effective to suppress the oxygen vacancy formation in LIO, which is beneficial to suppress the dark current and enhance the response speed. The optimized LIO photodetector achieves a fast rise/fall time of 20 ms/73 ms, a low dark current of 2.0 × 10-12 A, a photo-to-dark current ratio of 1.2 × 103, and a detectivity of 6 × 1012 Jones.
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