Conjugated polymers with broad absorption: Synthesis and application in polymer solar cells |
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| Authors: | Jinsheng Song Chi Zhang Cuihong Li Weiwei Li Ruiping Qin Binsong Li Zhengping Liu Zhishan Bo |
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| Institution: | 1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;2. College of Chemistry, Beijing Normal University, Beijing 100875, China |
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| Abstract: | A series of main chain donor‐acceptor low‐bandgap conjugated polymers were designed, synthesized, and used for the fabrication of polymer solar cells. The absorption spectra of low‐bandgap conjugated polymers were tuned by the ratio of three copolymerization monomers. The polymers in films exhibited broad absorption ranging from 300 to 1000 nm with optical bandgaps of around 1.40 eV. All of the polymers have been investigated as an electron donor in photovoltaic cells blending with PCBM (6, 6]‐phenyl C61‐butyric acid methyl ester) as an electron acceptor and power conversion efficiencies (PCEs) of 1.32–1.8% have been obtained. As for P1 , PCE increases from 1.67 to 2.44% after adding 1,8‐diiodooctance as an additive. The higher PCEs are probably because of better phase separation of blend films. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2571–2578, 2010 |
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| Keywords: | conjugated copolymers photovoltaic polycondensation solar cells structure‐property relations Suzuki– Miyaura– Schlü ter |
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