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Citation: HAN Zhi-Zhong, WEI Li-Yuan, GUO Ye, PAN Hai-Bo, CHEN Jian-Zhong, CHEM Nai-Sheng. Synthesis and Photovoltaic Charateristics of Ag-Ag2Se Sensitized ZnO Flower-Rod Heterostructures[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(9): 1856-1862. doi: 10.3969/j.issn.1001-4861.2013.00.247 shu

Synthesis and Photovoltaic Charateristics of Ag-Ag2Se Sensitized ZnO Flower-Rod Heterostructures

  • 1.

    1 College of Chemistry and Chemical Engineering, Fuzhou Universty, Fuzhou 350108, China;

  • Received Date: 15 January 2013
    Available Online: 18 March 2013

    Fund Project: 国家自然科学基金(No.91022025,51072036,21201035) (No.91022025,51072036,21201035)福建省自然基金(No.2012J01204)资助项目。 (No.2012J01204)

  • ZnO flower-rod ordered arrays (ZFRs) were synthesized via a liquid phase method, and the ZFRs were sensitized with Ag and Ag2Se quantum dots (AA-ZFRs) by ion exchange. Scanning electron microscopy (SEM), powder X-ray diffraction (XRD), energy dispersive X-ray spectra (EDS), and transmission electron microscopy (TEM) were used to characterize Ag and Ag2Se sensitized ZnO flower-rods (AA-ZFRs). And the photoelectrochemical properties and quantum efficiency were also investigated. The results indicate that the optical absorption of AA-ZFRs can be controllably tuned to cover almost the entire visible spectrum. The sensitization with Ag-Ag2Se restrains the recombination of photogenerated electron-hole pairs due to the heterojunction between Ag-Ag2Se and ZFRs, and enhances the incident photon-to-electron conversion efficiency. Thus, the as-prepared AA-ZFRs exhibit a higher open-circuit photovoltage (-0.77 V Ag/AgCl) and short-circuit photocurrent (0.64 mA·cm-2) under visible light.
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