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Ultra-high responsivity graphene-CIS/ZnS QDs hybrid photodetector
Author(s): Rui Pan; Jun Wang
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Paper Abstract

With the wide application of graphene in the field of photoelectric field, many researchers have paid increasingly attention to the graphene photodetectors. However, the absorption of graphene to light is only 2.3%, which limited the photoresponsivity of graphene photodetectors. In recent years, benefited from the development of solar cells and LED industry, more and more optical-nano-materials have been measured. The combination of these materials and graphene is a way to improve the responsivity of graphene photodetectors. CuInS2/ZnS quantum dots material has a long carrier lifetime and high absorption for light. We have prepared a photodetector based on CuInS2/ZnS quantum dots and mechanical peeling graphene, which presented a responsivity up to 2.5×105 A W-1. The ultra-high responsivity is attributed to the high photoconductive gain of the device. Further more, we have discussed the photogating effect which is the reason of the high photoconductive gain.

Paper Details

Date Published: 8 February 2019
PDF: 6 pages
Proc. SPIE 10843, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging, 108431B (8 February 2019); doi: 10.1117/12.2506576
Show Author Affiliations
Rui Pan, Univ. of Electronic Science and Technology of China (China)
Jun Wang, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 10843:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging
Yadong Jiang; Xiaoliang Ma; Xiong Li; Mingbo Pu; Xue Feng; Bernard Kippelen, Editor(s)

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