Stepwise cosensitization for high efficiency dye-sensitized solar cells utilizing solid-state polymer electrolytes

Wei Wei, Donghoon Song, Yong Soo Kang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Mesoporous TiO2 surface engineering is a field to be still advanced toward highly efficient dye-sensitized solar cells (DSCs) utilizing solid-state polymer electrolytes. Herein, a facile and stepwise cosensitization method is applied for ruthenium C106 dye and organic D131 dye. After the C106 dyes were adsorbed, D131 dyes were subsequently coadsorbed onto empty sites of the mesoporous TiO2 surface without desorption of the C106 dyes, and their amount was controlled by varying the concentration of the D131 dye solution. At the optimal concentration of the D131 dye solution, a remarkable energy conversion efficiency of 8.4% was attained under 1 sun illumination conditions, as a result of a noticeable rise in photocurrent density. According to the photovoltaic characterization, both the light harvesting and the charge collection efficiencies for DSCs prepared by the stepwise cosensitization process were greatly superior to those of individual C106 or D131 dyes.

Original languageEnglish (US)
Article number19535
Pages (from-to)435-438
Number of pages4
JournalMaterials Letters
Volume161
DOIs
StatePublished - Sep 5 2015

Bibliographical note

Funding Information:
This work was supported by the Korea Center for Artificial Photosynthesis (KCAP) (Number 2009-0093883 ).

Publisher Copyright:
© 2015 Published by Elsevier B.V.

Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.

Keywords

  • Charge collection
  • Dye-sensitized solar cells
  • Light harvesting
  • Solid-state polymer electrolytes
  • Stepwise cosensitization

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