期刊
EUROPEAN POLYMER JOURNAL
卷 49, 期 12, 页码 3921-3928出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2013.08.021
关键词
Conjugated polymers; Organic photovoltaics; Donor-acceptor system; Optical properties; Electrochemical properties; SCLC
资金
- Iowa Energy Center
- National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1140766, 1232067] Funding Source: National Science Foundation
We report the synthesis of two solution-processable reduced band gap donor-acceptor conjugated polymers p(C8-DPP-F) and p(C12-DPP-F), composed from 9,9-dioctylfluorene as the donor moiety, diketopyrrolopyrrole (DPP) moiety as the acceptor moiety and furan bridges. Two different alkyl chains, n-dodecyl and n-octyl,were used on the DPP moiety and the impact of this structural modification evaluated in detail. Both polymers exhibited similar optical and electrochemical properties with optical band gap of around 1.75 eV as result of LUMO levels near -3.4 eV and high-lying HOMO levels of similar to 5.2 eV. Bulk heterojunction photovoltaic devices using these polymers electron donors along with PC70BM as the electron acceptor, gave power conversion efficiency of 1.60% and 0.75% for p(C12-DPP-F) and p(C8-DPP-F) respectively. (C) 2013 Elsevier Ltd. All rights reserved.
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