Dye-sensitized solar cells based on bisindolylmaleimide derivatives |
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Authors: | Qiong Zhang Zhijun Ning Hongcui Pei Wenjun Wu |
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Institution: | (1) School of Advanced Materials Science and Engineering, College of Engineering, Yonsei University, Seoul, 120-749, Republic of Korea;(2) KEPRI, Korea Electric Power Research Institute, Munji-dong, Yuseong-gu, Daejeon, 305-760, Republic of Korea; |
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Abstract: | Three organic dyes based on bisindolylmaleimide derivatives (I1, I2 and I3) were synthesized and investigated as sensitizers
for the application in nanocrystalline TiO2 solar cells. The indole group, maleimide group and carboxylic group functioned as electron donor, acceptor and anchoring
group, respectively. Solar-to-electrical energy conversion efficiencies under simulated amplitude-modulated 1.5 irradiation
(100 mW·cm?2) of 2.07% were obtained for solar cells based on I2 and of 1.87% and 1.50% for I3 and I1, respectively. The open circuit
voltage V
oc was demonstrated to be enhanced by the introduction of dodecyl or benzyl moieties on the indole groups. The nonplanar structure
of bisindolylmaleimide was proven to be effective in aggregation resistance. This work suggests that organic sensitizers with
maleimide as electron acceptor are promising candidates as organic sensitizers in dye-sensitized solar cells. |
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