Significantly improved photocurrent response of ZnS-reduced graphene oxide composites

Sookhakian, M. and Amin, Y.M. and Zakaria, R. and Basirun, Wan Jefrey and Mahmoudian, M.R. and Nasiri-Tabrizi, B. and Baradaran, S. and Azarang, M. (2015) Significantly improved photocurrent response of ZnS-reduced graphene oxide composites. Journal of Alloys and Compounds, 632. pp. 201-207. ISSN 0925-8388,

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ZnS-nanoparticles (NPs) reduced graphene oxide (rGO) composites with a high degree of crystallinity and high dispersity were successfully synthesized via a facile solvothermal method in the gelatin medium, during which the formation of ZnS NPs, reduction of graphene oxide and loading of ZnS NPs into the rGO surface occur simultaneously. Gelatin, as a natural capping agent, plays a significant role in controlling the degree of dispersion and coverage of ZnS NPs. The effect of rGO on the crystalline structure and optical properties of ZnS NPs were determined via X-ray diffraction, UV-visible diffused reflectance spectroscopy and photoluminescence spectroscopy. The ZnS-rGO composites exhibit excellent potential for photocurrent generation compared with pure ZnS NPs under visible light irradiation, provided that efficient photoinduced charge separation and transportation can be achieved at the interface. The maximum photocurrent response was obtained for ZnS-rGO composite with a 3% mass fraction of rGO, which is 2 times that achieved on pure ZnS NPs. (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Zinc sulfide; Reduced graphene oxide; Transient photocurrent; Solar cell; Electrochemical impedance spectroscopy
Subjects: Q Science > Q Science (General)
Depositing User: Mr Faizal 2
Date Deposited: 13 Apr 2015 02:43
Last Modified: 31 Jan 2019 07:32

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