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Journal of Solid State Electrochemistry

, Volume 22, Issue 11, pp 3621–3630 | Cite as

Highly efficient dye-sensitized solar cells by TiCl4 surface modification of ZnO nano-flower thin film

  • Yogesh Waghadkar
  • Manish Shinde
  • Sunit Rane
  • Suresh Gosavi
  • Chiaki Terashima
  • Akira Fujishima
  • Ratna Chauhan
Original Paper
  • 111 Downloads

Abstract

In dye-sensitized solar cells (DSSCs), the semiconductor photo-anode film plays a significant role in enhancing the overall power conversion efficiency. ZnO is considered as the futuristic hope for photoanodes in DSSCs due to manifold properties over TiO2. However, the power conversion efficiency of ZnO-based DSSCs is still low due to its poor chemical stability and surface defects. In this work, we reported the synthesis of ZnO nano-flowers as well as its surface modification of with TiCl4 at different concentration. In DSSCs, the enhancement in power conversion efficiency results suggested that surface modification of ZnO film by TiCl4 leads to the deposition of TiO2 which subsequently increases the roughness factor of film as well as scattering layer. This preferential surface modification of ZnO film facilitates the accumulation of large number of photo-injected electrons in the HOMO of the photoanode with rapid transfer of charge carriers to FTO via ZnO layer by lowering the recombination of photo-injected electrons with the redox electrolyte as well as oxidized dye. The intensity-modulated photocurrent spectroscopy (IMVS) and intensity-modulated photovoltage spectroscopy (IMPS) study also indicated that the recombination rate decreased considerably during the electron transportation. The ZnO film surface modified by TiCl4 achieved a power conversion efficiency of 4.48%, which is two times higher than that of the non-modified ZnO photoanode.

Keywords

ZnO nanoflower TiO2 nanoparticles DSSC Efficiency 

Notes

Acknowledgments

Authors CT and AF would like to thank Sakura Exchange Program in Science for allowing to visit Photocatalysis International Research Centre Research Institute for Science & Technology, Tokyo University ofScience, Japan.

Funding information

The author RC acknowledges to the Department of Science and Technology, New Delhi, Govt. of India, for the financial support via Project No. IFA12-CH-34. MDS and SBR acknowledge the support from Ministry of Electronics and Information Technology (MeitY), New Delhi, Govt. of India.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Yogesh Waghadkar
    • 1
    • 2
  • Manish Shinde
    • 1
  • Sunit Rane
    • 1
  • Suresh Gosavi
    • 3
  • Chiaki Terashima
    • 4
  • Akira Fujishima
    • 4
  • Ratna Chauhan
    • 1
  1. 1.Materials for Renewable Energy DivisionCentre for Materials for Electronics Technology (C-MET)PuneIndia
  2. 2.Department of TechnologySavitribai Phule Pune UniversityPuneIndia
  3. 3.Department of PhysicsSavitribai Phule Pune UniversityPuneIndia
  4. 4.Photocatalysis International Research Center, Research Institute for Science & TechnologyTokyo University of ScienceChibaJapan

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