Low band-gap weak donor–strong acceptor conjugated polymer for organic solar cell

By insertion of an additional weak acceptor into a donor–acceptor conjugated polymer backbone, a new weak donor–strong acceptor alternating copolymer PTTBOBT-DFBT was synthesized and it showed a low band-gap of 1.64 eV with a deep HOMO energy level (−5.44 eV). The bulk heterojunction (BHJ) solar cel...

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Bibliographic Details
Published in:RSC advances 2015-01, Vol.5 (120), p.98876-98879
Main Authors: Shi, Zugui, Hoi Ka, Ivy Wong, Wang, Xizu, Vijila, Chellappan, Wang, Fei, Li, Gongqiang, Tjiu, Weng Weei, Li, Jun, Xu, Jianwei
Format: Article
Language:English
Subjects:
Copolymers
Energy conversion efficiency
Energy gaps (solid state)
Energy levels
Heterojunctions
Insertion
Photovoltaic cells
Solar cells
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Summary:By insertion of an additional weak acceptor into a donor–acceptor conjugated polymer backbone, a new weak donor–strong acceptor alternating copolymer PTTBOBT-DFBT was synthesized and it showed a low band-gap of 1.64 eV with a deep HOMO energy level (−5.44 eV). The bulk heterojunction (BHJ) solar cell fabricated from polymer PTTBOBT-DFBT displayed a remarkable power conversion efficiency (PCE) of 5.36% ( J sc = 11.04 mA cm −2 , FF = 63.65%, V oc = 0.76 V).
ISSN:2046-2069
2046-2069
DOI:10.1039/C5RA19715E