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Double-Shell SnO2/CeO2:Yb,Er Hollow Nanospheres as an Assistant Layer Suppressing the Charge Recombination in Dye-Sensitized Solar Cells

Abstract

Double-shell SnO2/CeO2:Yb,Er hollow nanospheres (HNSs) are prepared by using SiO2 as templates. Firstly, CeO2:Yb,Er nanoparticles (NPs) were coated on the surface of SiO2 to generate core-shell SiO2@CeO2:Yb,Er nanospheres. Then the removal of SiO2 cores accompany with the SnO2 deposition to form the heterogeneous double-shell SnO2/CeO2:Yb,Er HNSs during a hydrothermal process. The deposition of SnO2 shell as the framework supports the CeO2:Yb,Er shell from the structure analysis. When SnO2/CeO2:Yb,Er HNSs act as an assistant layer in dye-sensitized solar cells (DSSCs), the photoelectric conversion efficiency (PCE) is enhanced to 8.66%. The open-circuit voltage decay confirms that the lifetime of photogenerated electrons in the cells is prolonged. Double-shell SnO2/CeO2:Yb,Er HNSs might efficiently suppress the recombination of photoproduced electron-hole, extend the electron lifetime, and further improve the photoelectric conversion performance of DSSCs.

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Publication details

The article was received on 10 May 2018, accepted on 12 Jul 2018 and first published on 13 Jul 2018


Article type: Paper
DOI: 10.1039/C8NJ02293C
Citation: New J. Chem., 2018, Accepted Manuscript
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    Double-Shell SnO2/CeO2:Yb,Er Hollow Nanospheres as an Assistant Layer Suppressing the Charge Recombination in Dye-Sensitized Solar Cells

    R. Zhao, D. Tang, Q. Wu, W. Li, X. Zhang, R. Guo, M. Chen and G. Diao, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ02293C

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