摘要
Due to the wide application of UV-A(320 nm–400 nm)and UV-C(200 nm–280 nm)photodetectors,dual-wavelength(UV-A/UV-C)photodetectors are promising for future markets.A dual-wavelength UV photodetector based on vertical(Al,Ga)N nanowires and graphene has been demonstrated successfully,in which graphene is used as a transparent electrode.Both UV-A and UV-C responses can be clearly detected by the device,and the rejection ratio(R254 nm/R450 nm)exceeds35 times at an applied bias of-2 V.The short response time of the device is less than 20 ms.Furthermore,the underlying mechanism of double ultraviolet responses has also been analyzed systematically.The dual-wavelength detections could mainly result from the appropriate ratio of the thicknesses and the enough energy band difference of(Al,Ga)N and Ga N sections.
作者
周敏
赵宇坤
边历峰
张建亚
杨文献
吴渊渊
邢志伟
蒋敏
陆书龙
Min Zhou;Yukun Zhao;Lifeng Bian;Jianya Zhang;Wenxian Yang;Yuanyuan Wu;Zhiwei Xing;Min Jiang;Shulong Lu(Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO),Chinese Academy of Sciences(CAS),Suzhou 215123,China;School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,China)
基金
the National Key Research and Development Program of China(Grant No.2018YFB0406602)
Natural Science Foundation of Jiangsu Province,China(Grant No.BK20180252)
Key Research Program of Frontier Sciences,CAS(Grant No.ZDBS-LY-JSC034)
the National Natural Science Foundation of China(Grant Nos.61804163,61875224,and 61827823)
the Key Research and Development Program of Jiangsu Province,China(Grant No.BE2018005)
Natural Science Foundation of Jiangxi Province,China(Grant No.20192BBEL50033)
Research Program of Scientific Instrument,Equipment of CAS(Grant No.YJKYYQ20200073)
SINANO(Grant Nos.Y8AAQ21001 and Y4JAQ21001)
Vacuum Interconnected Nanotech Workstation(Grant Nos.Nano-X and B2006)。
