Visible to near-infrared photodetector based on organic semiconductor single crystal  

基于有机半导体单晶的可见至近红外光电探测器

作　　者：LI Xiang HU Jin-Han ZHONG Zhi-Peng CHEN Yu-Zhong WANG Zhi-Qiang SONG Miao-Miao WANG Yang ZHANG Lei LI Jian-Feng HUANG Hai 李湘;胡金瀚;钟志鹏;陈于中;王志强;宋苗苗;王洋;张磊;李建丰;黄海(兰州交通大学数理学院,甘肃兰州730070;复旦大学光电研究院、材料科学系上海智能光电与感知前沿科学研究基地光伏科学与技术国家重点实验室,上海200433;兰州交通大学材料科学与工程学院,甘肃兰州730070)

机构地区：[1]School of Mathematics and Physics,Lanzhou Jiaotong University,Lanzhou 730070,China [2]State Key Laboratory of Photovoltaic Science and Technology,Shanghai Frontiers Science Research Base of Intelligent Optoelectronic and Perception,Institute of Optoelectronic and Department of Material Science,Fudan University,Shanghai 200433,China [3]School of Materials Science and Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China

出　　处：《红外与毫米波学报》2025年第1期46-51,共6页Journal of Infrared and Millimeter Waves

基　　金：Supported by the National Key Research and Development Program of China(2021YFB2012601);National Natural Science Foundation of China(12204109);Science and Technology Innovation Plan of Shanghai Science and Technology Commission(21JC1400200);Higher Education Indus⁃try Support Program of Gansu Province(2022CYZC-06)。

摘　　要：Organic semiconductor materials have shown unique advantages in the development of optoelectronic devices due to their ease of preparation,low cost,lightweight,and flexibility.In this work,we explored the application of the organic semiconductor Y6-1O single crystal in photodetection devices.Firstly,Y6-1O single crystal material was prepared on a silicon substrate using solution droplet casting method.The optical properties of Y6-1O material were characterized by polarized optical microscopy,fluorescence spectroscopy,etc.,confirming its highly single crystalline performance and emission properties in the near-infrared region.Phototransistors based on Y6-1O materials with different thicknesses were then fabricated and tested.It was found that the devices exhibited good visible to near-infrared photoresponse,with the maximum photoresponse in the near-infrared region at 785 nm.The photocurrent on/off ratio reaches 10^(2),and photoresponsivity reaches 16 mA/W.It was also found that the spectral response of the device could be regulated by gate voltage as well as the material thickness,providing important conditions for optimizing the performance of near-infrared photodetectors.This study not only demonstrates the excellent performance of organic phototransistors based on Y6-1O single crystal material in near-infrared detection but also provides new ideas and directions for the future development of infrared detectors.有机半导体材料因其易于制备、低成本、质量轻、可柔性弯折等特点,在光电子器件开发中表现出了独特的优势。本文探究了有机半导体晶体材料Y6-1O在光探测器件中的应用。首先利用溶液滴铸法在硅基衬底上制备Y6-1O单晶材料,并利用偏光显微镜、荧光光谱等方法表征了Y6-1O材料的光学性质,验证其高度单晶结晶性能以及近红外区的发光性能。接着制备了基于不同厚度Y6-1O材料的场效应晶体管器件,通过光电性能测试,发现器件表现出良好的可见至近红外光响应,器件的光谱响应峰值在785 nm的近红外区,光开关比达10^(2),光响应率可达16 mA/W。还发现器件的光谱响应可受栅压调控,并且与材料厚度等因素相关,为优化调节近红外光电探测器性能提供了重要条件。本研究不仅展示了基于Y6-1O单晶材料的有机光电晶体管在近红外探测上的优异性能,也为未来发展红外探测器提供了新的思路和方向。

关 键 词：near-infrared photodetector organic semiconductor Y6-1O single crystal spectral response 

分 类 号：TN383[电子电信—物理电子学]