The synthesis and application of TiO2 microspheres as scattering layer in dye-sensitized solar cells

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Abstract

Mesoporous TiO2 microspheres have been synthesized via a simple one-plot hydrothermal method and were used as the light scattering layer on top of the P25 TiO2 compact layer to form a double-layer film based photoanode for the dye-sensitized solar cell (DSSC). Characteristics and light scattering properties were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, nitrogen sorption analysis and ultraviolet–visible spectroscopy. Photovoltaic performance of the fabricated DSSC was also investigated. It showed that photoelectric conversion efficiency of the double-layer film based DSSC was increased to 5.61% compared with single P25 compact layer film based (2.67%) and single TiO2 microspheres layer film based (2.14%) DSSC. Improvement of DSSC performance can be attributed to excellent light scattering capability given by mesoporous TiO2 microspheres. Electrochemical impedance spectra analysis also proved that double-layered structure can result in prolonged exciton lifetime, improved charge collection efficiency and decreased charge recombination.

Supplementary material

10854_2018_8725_MOESM1_ESM.docx (147 kb)
Supplementary material 1 (DOCX 146 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Weiguo Zhang
    • 1
  • Jiabao Gu
    • 1
  • Suwei Yao
    • 1
  • Hongzhi Wang
    • 1
  1. 1.Department of Applied Chemistry, School of Chemical Engineering and TechnologyTianjin UniversityTianjinPeople’s Republic of China

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