Fabrication control of MoS2/MoO2 nanocomposite via chemical vapor deposition for optoelectronic applications
Materials Science and Engineering: B(2022)
Abstract
We report on the fabrication and control of MoS2/MoO2 nanocomposites exhibiting various optoelectronic properties. We demonstrate the growth of various compositions, shapes and crystalline structures by chemical vapor deposition (CVD). Microplates 1 to 30 mu m to highly crystalline nanowires similar to 100 nm in diam. are obtained. Our findings show that depending on the MoO2 content the band gap varies from 2 eV to 2.4 eV, whereas nanowires sample exhibits the lowest reflectance <= 10 % for lambda >= 450 nm. Furthermore, the photoelectric properties of the produced samples were characterized by integrating them into photoconductive devices. Our results demonstrate a good photoresponse achieving 2 x 10(4) %, a responsivity as high as 1.13 mA/W, and a specific detectivity of 2.6 x 10(9) Jones for the nanowires, with a relatively rapid rise and decay times 1.6 s and 0.8 s, respectively. This work emphasizes the high potential of MoS2/MoO2 nanocomposite for the development of highly responsive optoelectronic devices.
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Key words
MoS2/MoO2 nanocomposite,MoS2/MoO2 heterostructure,MoS2 nanowires,Chemical vapor deposition,Photocurrent,Photoresponse
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