高性能零维非铅钙钛矿薄膜光电探测器

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中图分类号：TP394.1;TH691.9 文献标志码：A doi：10.37188/CO.2024-0214 CSTR：32171.14.CO.2024-0214

Abstract： In this study， we employ a MACl post-treatment to enhance the quality of MA3Sb2I9 perovskite thin films fabricated through antisolvent processng.This treatment facilitated the formation of Cl-Sb bond interactions between MACl and the perovskite thin films， effectively passivating the I- vacancies and grain boundary defects on the MA3Sb2I9 thin-film surface. This process not only improved the surface morphology and crystallnity of the thin film but also reduced the defect states density of the surface，thereby enhancing the efficiency of carrer extraction and transport. Consequently，the sensitivity of self-powered photodetectorsbased on the optimized thin-film preparation increased from 3.89×107 Jones to 5.72×108 Jones，representing an improvement by one order of magnitude. Furthermore， the rise and falltimes were shortened from 37/76 ms to 31/37 ms， respectively， indicating an enhancement in the response speed of the devices.

Key words： perovskite; zero-dimensional; lead-free; self-powered; photodetectors

1引言

随着以光电技术为基础的数字化、智能化的发展，光电探测技术作为光电技术的核心部分，也显现出了重要的战略地位。（剩余11652字）