Indolo[3,2,1-jk]carbazole Derivatives-Sensitized Solar Cells: Effect of 蟺-Bridges on the Performance of Cells

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• 作者：Chunhua Luo ; Weixin Bi ; Shiming Deng ; Jian Zhang ; Shiyou Chen ; Bo Li ; Qiancai Liu ; Hui Peng ; Junhao Chu
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：July 3, 2014
• 年：2014
• 卷：118
• 期：26
• 页码：14211-14217
• 全文大小：412K
• ISSN：1932-7455

文摘

Four organic dyes based on indolo[3,2,1-jk]carbazole (IC-1, IC-2, IC-3, and IC-4) with different 蟺-bridges (benzene ring and thiophene ring) are used for dye-sensitized solar cells (DSSCs) to investigate the effect of 蟺-bridge on their photovoltaic performance. The introduction of thiophene ring as 蟺-bridge (the dye IC-2) greatly improves the cell performance compared to benzene ring. The increasing conjugation length of the molecules decreases the performance of DSSCs. The best performance of DSSC based on IC-2 is obtained with a V_oc of 0.66 V and a conversion efficiency of 3.68%. The poor performance of DSSCs based on IC-1 and IC-3 which contains only benzene ring as the 蟺-bridge can be attributed to poor spectral coverage and higher electron charge transfer resistance as evaluated from EIS studies.