A versatile photodetector assisted by photovoltaic and bolometric effects

查看全文 作　　者：Wei [1,2]Jiang;Tan [3]Zheng;Binmin [1]Wu;Hanxue [1]Jiao;Xudong [1]Wang;Yan [1]Chen;Xiaoyu [1]Zhang;Meng [1]Peng;Hailu [1,2]Wang;Tie [1]Lin;Hong [1]Shen;Jun [1]Ge;Weida [1]Hu;Xiaofeng [3]Xu;Xiangjian [1]Meng;Junhao [1]Chu;Jianlu [1]Wang

机构地区：[1]State Key Laboratory of Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,500 Yutian Road,Shanghai 200083,China;[2]University of Chinese Academy of Sciences,Beijing 100049,China;[3]Department of Applied Physics,Donghua University,No.2999,North Renmin Road,Songjiang District,Shanghai 201620,China

出　　处：《Light(Science & Applications)》索引2020年第9卷第1期,共9页

基　　金：supported by the Natural Science Foundation of China(Grant Nos.61835012,61722408,61725505,61521005,and 61905267);the Key Research Project of Frontier Sciences of the Chinese Academy of Sciences(Grant Nos.QYZDB-SSW-JSC016 and QYZDY-SSW-JSC042);the Key Research Program of Frontier Science,CAS(Grant No.ZDBS-LY-JSC045);the Major State Basic Research Development Program(Grant No.2016YFA0203900);the National Postdoctoral Program for Innovative Talents(BX20180329);the Natural Science Foundation of Shanghai(Grant Nos.16ZR1447600 and 17JC1400302);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB44000000). 摘　　要：The advent of low-dimensional materials with peculiar structure and superb band properties provides a new canonical form for the development of photodetectors.However,the limited exploitation of basic properties makes it difficult for devices to stand out.Here,we demonstrate a hybrid heterostructure with ultrathin vanadium dioxide film and molybdenum ditelluride nanoflake.Vanadium dioxide is a classical semiconductor with a narrow bandgap,a high temperature coefficient of resistance,and phase transformation.Molybdenum ditelluride,a typical two-dimensional material,is often used to construct optoelectronic devices.The heterostructure can realize three different functional modes:(i)the p-n junction exhibits ultrasensitive detection(450 nm-2μm)with a dark current down to 0.2 pA and a response time of 17μs,(ii)the Schottky junction works stably under extreme conditions such as a high temperature of 400 K,and(iii)the bolometer shows ultrabroad spectrum detection exceeding 10μm.The flexible switching between the three modes makes the heterostructure a potential candidate for next-generation photodetectors from visible to longwave infrared radiation(LWIR).This type of photodetector combines versatile detection modes,shedding light on the hybrid application of novel and traditional materials,and is a prototype of advanced optoelectronic devices. 关键词：RESISTANCE dioxide VERSATILE

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A versatile photodetector assisted by photovoltaic and bolometric effects

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