基于有机-无机范德瓦耳斯异质结的自供电日盲光电探测及其单像素点光学成像
Self-powered solar-blind photodetector and single-pixel optical imaging based on organic-inorganic van der Waals heterojunctions
摘要
Abstract
Solar-blind ultraviolet photodetector holds significant application potential in fields such as military defense,communication,medical treatment,and environmental monitoring.Developing self-powered detectors is essential for eliminating the dependence on external bias voltage and reducing high energy consumption of traditional devices.In this study,high-quality β-Ga2O3 thin films were prepared via plasma-enhanced chemical vapor deposition and which were subsequently combined with spin-coated PEDOT:PSS to fabricate an organic-inorganic van der Waals heterojunction self-powered solar-blind photodetector.Its photoelectric performance and potential for single-pixel imaging applications were systematically investigated.Structural characterization reveals that the prepared β-Ga2O3 thin film exhibits good crystallinity and a smooth surface,with selective absorption in the solar-blind ultraviolet region and an optical bandgap of approximately 4.92 eV.Under zero bias and 254 nm illumination at intensity of 47 μW/cm2,the detector achieves a photo-to-dark current ratio of 8.8 ×103,a responsivity of 0.106 A/W,and an external quantum efficiency of 38％.The photocurrent exhibits a near-linear dependence on light intensity.The device operates stably under both positive and negative bias,with low dark current,minimal noise,and excellent weak-light detection capability.By employing a fixed-step point-by-point scanning method,the detector achieved single-pixel solar-blind ultraviolet optical imaging of the letters"IMU",demonstrating good imaging quality and high fidelity.The heterojunction detector developed in this study combines the advantages of self-powered operation,simple structure,and low cost,overcoming the limitations of traditional materials used in single-pixel imaging approaches,thereby offering a promising strategy for improving solar-blind ultraviolet detection technology and demonstrating significant potential for practical applications in the field of single-pixel optical imaging.关键词
日盲紫外探测器/氧化镓/异质结/自供电Key words
solar-blind ultraviolet photodetector/gallium oxide/heterojunction/self-power引用本文复制引用
王霞,李磊,李山,张嘉汉,刘增,唐为华..基于有机-无机范德瓦耳斯异质结的自供电日盲光电探测及其单像素点光学成像[J].物理学报,2026,75(11):254-262,9.基金项目
国家自然科学基金(批准号:U23A20349,62501320)、山西省基础研究计划(批准号:202103021223388)、江苏省双创团队(批准号:JSSCTD202351)、苏州市科技计划(批准号:SYG2024003)、内蒙古大学实验技术研究项目(批准号:SYJS2025004)和山西工程技术学院科技项目(批准号:2021QD-15)资助的课题. Project supported by the National Natural Science Foundation of China(Grant Nos.U23A20349,62501320),the Fundamental Research Program of Shanxi Province,China(Grant No.202103021223388),the Jiangsu Provincial Team of Innovation and Entrepreneurship,China(Grant No.JSSCTD202351),the Key Technology Project of Suzhou City,China(Grant No.SYG2024003),the Inner Mongolia University Experimental Technology Research Project in 2025,China(Grant No.SYJS2025004),and the Science and Technology Project of Shanxi Institute of Technology,China(Grant No.2021QD-15). （批准号:U23A20349,62501320）
