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A Planar Dithiafulvene Based Sensitizer Forming J-Aggregates on TiO2 Photoanode to Enhance the Performance of Dye-Sensitized Solar Cells

Authors Cheng, Jun
Zhang, Fang
Li, Ke
Li, Jie
Lu, Xiaoqing
Zheng, Jingxia
Guo, Kunpeng
Yang, Shihe View this author's profile
Dong, Qingchen
Issue Date 2017
Source Dyes and Pigments , v. 136, January 2017, p. 97-103
Summary A newly planar dithiafulvene sensitizer (DTF-C4) trending to form J-aggregates on the surface of mesoporous TiO2 by simply rinsing with a poor solvent acetonitrile was synthesized. We further show that the self -assembled J-aggregates optimized the TiO2 surface utilization, enhanced the light harvesting ability by broadening and red-shifting the absorption, and suppressed the electron recombination, thereby significantly promoting the solar cell efficiency. Compared to the photoanode surface modified with DTF-C4 and the classical coadsorbent chenodeoxycholic acid (CDCA), the DSC based the DTF-C4 compact J-aggregates exhibited a dramatically improved performance without the loss of adsorbed dyes, uplifting the power conversion efficiency from 4.68% to 7.48% alongside with a high open-circuit voltage of above 850 mV, which is higher than that of the commercial N719-based cell (770 mv). (C) 2016 Elsevier Ltd. All rights reserved.
ISSN 0143-7208
Language English
Format Article
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