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Molecules 2016, 21(6), 789; doi:10.3390/molecules21060789

Synthesis of a Conjugated D-A Polymer with Bi(disilanobithiophene) as a New Donor Component

1
Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan
2
Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
*
Authors to whom correspondence should be addressed.
Academic Editor: Mitsuo Kira
Received: 30 April 2016 / Revised: 7 June 2016 / Accepted: 13 June 2016 / Published: 17 June 2016
(This article belongs to the Special Issue Advances in Silicon Chemistry)
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Abstract

A new conjugated donor-acceptor (D-A) polymer pDSBT2-BT containing bi(disilano-bisthiophene) and benzothiadiazole as donor and acceptor units, respectively, was prepared. The polymer showed a broad UV-vis absorption band at λmax = 599 nm in chlorobenzene. The absorption band was shifted to λmax = 629 nm when the polymer was measured as a film, indicating enhanced interchain interactions of the polymer. Bulk hetero-junction polymer solar cells (BHJ-PSCs) were fabricated using pDSBT2-BT and PC71BM as host and guest materials, respectively. Optimization of cell fabrication conditions provided a maximal power conversion efficiency of 3.3% and the following cell parameters: Voc = 0.86 V, Jsc = 7.56 mA/cm2, and FF = 0.51. Although the efficiency still leaves much to be desired, these data underscore the potential of pDSBT2-BT as a high-voltage polymer solar cell material. View Full-Text
Keywords: bulk heterojunction; polymer solar cell; D-A polymer; disilanobithiophene bulk heterojunction; polymer solar cell; D-A polymer; disilanobithiophene
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Nakashima, M.; Ooyama, Y.; Sugiyama, T.; Naito, H.; Ohshita, J. Synthesis of a Conjugated D-A Polymer with Bi(disilanobithiophene) as a New Donor Component. Molecules 2016, 21, 789.

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