4.6 Article

Solid-state reaction synthesis of two-dimensional CuGaSe2 nanosheets for high performance photodetectors

期刊

PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 16, 期 36, 页码 19340-19344

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp02736a

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资金

  1. National Natural Science Foundation of China (NSFC) [61172001, 21373068]
  2. National key Basic Research Program of China (973 Program) [2013CB632900]
  3. Scientific Research Foundation for the Returned Overseas Chinese Scholars [JJ20110033]

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CuGaSe2 is an important non-layered I-III-VI2 compound with superior optical properties. In this work, monocrystal two-dimensional (2D) CuGaSe2 nanosheets were successfully synthesized via a simple solid-state reaction. The electronic and optoelectronic properties of photodetectors based on 2D CuGaSe2 nanosheets were investigated for the first time. 2D CuGaSe2 FETs present a typical p-type conductance behaviour, and photodetectors based on 2D CuGaSe2 show a sensitive response to the UV-visible spectrum. Under 490 nm light illumination, the responsivity and detectivity of photodetectors are as high as 103 AW(-1) and 8 x 10(11) Jones, respectively. Our results offer a new opportunity to use 2D CuGaSe2 nanosheets for future nano-optoelectronic devices.

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