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Triphenylamine-based broad band-gap polymers for bulk-heterojunction polymer solar cells

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Abstract

Three triphenylamine-based broad band-gap polymers P1, P2, and P3 were designed and synthesized by Suzuki polycondensation. The optical band gaps of P1, P2, and P3 were 1.90, 19.5, and 1.99 eV, respectively. The calculated highest occupied molecular orbit energy levels of P1, P2, and P3 were −5.31, −5.29, and −5.32 eV, respectively, by cyclic voltammogram characterization. The hole mobilities of P1, P2, and P3 were 1.6 × 10−4, 5.9 × 10−5, and 4.1 × 10−5 cm2 v−1 s−1, respectively, by the space charge-limited current method. The polymer solar cells were fabricated under the device architecture of ITO/PEDOT:PSS/polymer:PC61BM or PC71BM/(PFN)/Al. All solar cells displayed the high open circuit voltages, where the highest ones can reach 0.90 V for P1 and P2. The P1- and P2-based solar cells gave the best power conversion efficiency of 3.37 and 3.34 %, respectively.

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Acknowledgements

This work was financially supported by the National Nature Science Foundation of China (Nos. 51273069, 91333206), the Research Fund for the Doctoral Program of Higher Education of China (No. 20130172110005), and the Fundamental Research Funds for the Central Universities (No. 2014ZB0017).

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Authors and Affiliations

  1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China

    Bin Zhang

  2. Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China

    Junfei Liang, Liwen Hu, Feng Peng, Guiting Chen & Wei Yang

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  1. Bin Zhang
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Correspondence to Bin Zhang.

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Zhang, B., Liang, J., Hu, L. et al. Triphenylamine-based broad band-gap polymers for bulk-heterojunction polymer solar cells. J Mater Sci 50, 5609–5619 (2015). https://doi.org/10.1007/s10853-015-9111-0

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