发光学报2026，Vol.47Issue(6)：960-969,10.DOI:10.37188/CJL.20260035
基于免抛光钙钛矿单晶的自驱动光电探测器
Polishing-free Perovskite Single Crystals for Self-powered Photodetection
摘要
Abstract
Traditional perovskite single-crystal optoelectronic devices typically rely on mechanical polishing to achieve flat interfaces.However,this process inevitably introduces severe lattice damage and deep-level defects,leading to increased dark current and significantly heightened noise in the devices,which severely limits their perfor-mance.To address these issues,this paper proposes a silicon wafer-assisted seed-reverse-temperature crystallization growth strategy.By leveraging the atomically flat surface of silicon wafers to regulate nucleation and growth behavior,it successfully achieves controlled growth of high-quality perovskite single crystals,directly yielding flat,growth-tex-ture-free native surfaces.Self-driven photodetectors were constructed using gold/silver asymmetric electrodes,sys-tematically investigating photoresponse characteristics under visible light and X-ray irradiation with both front and back illumination.At 0 V bias,the device exhibited a low dark current of 0.014 5 nA,a high on/off ratio of 196 un-der 500 nm front illumination,and a maximum responsivity of 2.44 mA·W-1.When light was incident from the rear,the response shifted from broadband to narrowband.X-ray testing revealed a sensitivity of 3 487 μC·Gyair-1·cm-2 at 0 V bias,with a detection limit as low as 21.99 nGyair·s-1.This study provides a simple polishing-free approach for constructing high-quality perovskite single-crystal interfaces,offering a novel technological pathway for developing ultra-sensitive,low-cost perovskite single-crystal photodetectors.关键词
钙钛矿单晶/单晶生长/光电探测器/X射线探测Key words
perovskite single crystal/single crystal growth/photodetector/X-ray detection分类
信息技术与安全科学引用本文复制引用
于迪,高峰,李林..基于免抛光钙钛矿单晶的自驱动光电探测器[J].发光学报,2026,47(6):960-969,10.基金项目
国家自然科学基金(62404063,12374392) （62404063,12374392）
黑龙江省自然科学基金(LH2023A011)Supported by National Natural Science Foundation of China(62404063,12374392) （LH2023A011）
Natural Science Foundation of Heilong-jiang(LH2023A011) （LH2023A011）
