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Synthesis of hierarchical nanowires-based TiO2 spheres for their application as the light blocking layers in CdS/CdSe co-sensitized solar cells

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Abstract

Three-dimensional nanowires-based TiO2 hierarchical spheres (TiO2-HS) have been fabricated by a simple hydrothermal method in this paper. These TiO2-HS composed of the aggregations of TiO2 nanowires with countless porous holes show good electronic transfer, high loading of quantum dots and high diffused reflection ability. These TiO2-HS were designed as the overlayer for light blocking and applied to quantum dots sensitized solar cells (QDSSCs) based on bare TiO2 nanoparticles (TiO2-NP). CdS and CdSe quantum dots were deposited by successive ionic layer absorption and reaction method. The results show that the values of the short-circuit current density (J sc) and the power conversion efficiency (η) have been increased up to 16.81 mA cm−2 and 4.50 % for the TiO2-NP/TiO2-HS double-layered QDSSCs, far higher than the single-layer TiO2-NP QDSSCs and TiO2-HS QDSSCs.

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Acknowledgments

This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. JB-ZR1137).

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Authors and Affiliations

  1. College of Material Science and Engineering, Engineering Research Center of Environment-Friendly Functional Materials for Ministry of Education, Huaqiao University, Xiamen, 361021, Fujian, People’s Republic of China

    Xiaolong Zhang, Yu Lin, Yibing Lin & Jihuai Wu

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  1. Xiaolong Zhang
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  2. Yu Lin
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  3. Yibing Lin
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Correspondence to Yu Lin.

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Zhang, X., Lin, Y., Lin, Y. et al. Synthesis of hierarchical nanowires-based TiO2 spheres for their application as the light blocking layers in CdS/CdSe co-sensitized solar cells. J Mater Sci: Mater Electron 26, 693–699 (2015). https://doi.org/10.1007/s10854-014-2451-8

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  • DOI: https://doi.org/10.1007/s10854-014-2451-8

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