Polyol Synthesis of Zinc Oxide-Graphene Composites: Enhanced Dye- Sensitized Solar Cell Efficiency

Author(s): M.R. Philip, Hieu P. T. Nguyen*, R. Babu, V. Krishnakumar, Thang H. Q. Bui

Journal Name: Current Nanomaterials

Volume 3 , Issue 1 , 2018

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Graphical Abstract:


Background: We report on the fabrication and characterization of Zinc Oxide (ZnO) and Zinc Oxide Graphene (ZnO-G) composites via a simple chemical route-polyol process, using zinc nitrate hexahydrate, ethylene glycol and reduced graphene oxide (RGO) as the precursors. The ZnO-G composites exhibit significantly enhanced photoluminescence, which is ~ 8 times stronger than that of ZnO samples. Such improved optical property is attributed to the contribution of plasmonic effect of graphene in ZnO-G. Moreover, the high crystalline quality ZnO-G composites hold great potential for dyesensitized solar cell (DSSC) applications.

Method: Graphite oxide (GO) was synthesized using modified hummers method. RGO was then synthesized from GO by using hydrazine hydrate as a reducing agent.

Results: The short-circuit current density was increased in the ZnOG solar cell compared to that of bare ZnO device, which is around 1.930 mA/cm2 and 0.308 mA/cm2 respectively. The conversion efficiency of the ZnO-G DSSC was measured as 0.438%, which is ~ 7 times higher than that of ZnO DSSC. The enhanced conversion efficiency achieved in ZnO-G DSSC resulted from the enhanced absorption and large surface area of the composite compared to ZnO. The synthesized flakes like ZnO and ZnO-G composites offer promising materials for DSSC applications.

Keywords: Zinc oxide, graphene, nanomaterials, porous, polyol method, dye sensitized solar cell.

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Article Details

Year: 2018
Published on: 17 September, 2018
Page: [52 - 60]
Pages: 9
DOI: 10.2174/2405461503666180507124310
Price: $58

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