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International Journal of Photoenergy
Volume 2011 (2011), Article ID 986869, 5 pages
http://dx.doi.org/10.1155/2011/986869
Research Article

Application of Diaminium Iodides in Binary Ionic Liquid Electrolytes for Dye-Sensitized Solar Cells

1School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
2School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China
3Key Lab of Novel Thin Film Solar Cells, Chinese Academy of Sciences, Hefei 230031, China

Received 27 January 2011; Revised 24 April 2011; Accepted 2 May 2011

Academic Editor: Gion Calzaferri

Copyright © 2011 Yanzhen Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

N-(2-hydroxyethyl)ethylenediaminium iodides (HEEDAIs) and N-(2-hydroxyethyl)piperazinium iodides (HEPIs) were synthesized, and their thermal properties were analysed. The influence of HEEDAI and HEPI on redox behavior in binary ionic liquid was investigated. The result revealed that HEEDAI can suppress the recombination between and the injected electrons in TiO2 conduction band and be used as the alternative of 4-tert-butylpyridine in the electrolyte of dye-sensitized solar cells. The electrolyte C, 0.15 mol·L−1 I2, HEEDAI and MPII with mass ratio of 1 : 4, gave the short-circuit photocurrent density of 9.36 mA·cm−2, open-circuit photovoltage of 0.67 V, fill factor of 0.52, and the corresponding photoelectric conversion efficiency of 3.24% at the illumination (air mass 1.5, 100 mW·cm−2, active area 0.25 cm2).