Carbazole Dyes with Ether Groups for Dye-Sensitized Solar Cells: Effect of Negative Charges in Dye Molecules on Electron Lifetime

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Published 22 October 2012 • Copyright (c) 2012 The Japan Society of Applied Physics
, , Citation Yu Uemura et al 2012 Jpn. J. Appl. Phys. 51 10NE14 DOI 10.1143/JJAP.51.10NE14

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1 Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan

2 Research Center for Photovoltaic Technologies, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan

3 Division of Chemistry and Materials, Shinshu University, Ueda, Nagano 386-8567, Japan

Dates

  1. Received 10 December 2011
  2. Accepted 7 January 2012
  3. Published

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Abstract

In order to examine the effect of partial charges of dye molecules on charge recombination in dye-sensitized solar cells, we synthesized carbazole-based dyes with ether chains on a π-conjugated oligothiophene linker. The addition of negatively charged oxygen atoms on ether chains resulted in a decrease of electron lifetime, suggesting that partial charges on the dye increased I3- concentration at the surface of TiO2.

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10.1143/JJAP.51.10NE14