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International Journal of Photoenergy
Volume 2018, Article ID 2061472, 9 pages
https://doi.org/10.1155/2018/2061472
Research Article

Novel Imidazole Substituted Bodipy-Based Organic Sensitizers in Dye-Sensitized Solar Cells

1School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
2College of Science and Technology, Nihon University, 1-18-14 Kanda Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan

Correspondence should be addressed to Mao Mao; nc.ude.tsiun@oamm and Xiao-Lin Zhang; nc.ude.tsiun@gnahznlx

Received 25 October 2017; Accepted 3 January 2018; Published 19 March 2018

Academic Editor: P. Davide Cozzoli

Copyright © 2018 Mao Mao 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

A comparative study on the photophysical, electrochemical properties and photovoltaic performances of pure imidazole dyes containing varying linker groups is done. Two new organic dyes containing 4,5-bis(4-methoxyphenyl)-1H-imidazole (BPI) unit as an electron donor, boron dipyrromethene (Bodipy) chromophore as a conjugate bridge, cyanoacetic acid as an electron acceptor, and phenylene (BPI-P) or thienyl (BPI-T) as a additional linker have been synthesized for fabricating dye-sensitized solar cells (DSSCs). A reference dye (DPI-T) with 6,9-dimethoxy-1H-phenanthro[9,10-d]imidazole as the donor has also been synthesized for comparison. The overall conversion efficiencies of 0.18%, 0.32%, and 1.28% were obtained for DSSCs based on BPI-P, BPI-T, and DPI-T, respectively. DPI-T was found to be more efficient than BPI-P and BPI-T because of its enhanced light harvesting efficiency and better coplanar geometry of the electronic structure.