Anthradithiophene-Containing Copolymers for Thin-Film Transistors and Photovoltaic Cells

作者：Jiang Ying; Okamoto Toshihiro; Becerril Hector A; Hong Sanghyun; Tang Ming Lee; Mayer Alex C; Parmer Jack E; McGehee Michael D; Bao Zhenan^*

来源：Macromolecules, 2010, 43(15): 6361-6367.

DOI：10.1021/ma1001639

We synthesized anthradithiophene-cyclopentadithiophene conjugated copolymers via Stille coupling. The anthradithiophene core was verified to be superior in stability compared to pentacene toward Diels-Alder cycloaddition and therefore more compatible with fullerenes, acceptor material commonly used in bulk heterojunction (BHJ) photovoltaic cells. The polymers exhibit high film absorption coefficients of 10(5) cm(-1), an order of magnitude higher than previously reported anthradithiophene-dialkylfluorene copolymers. Short-circuit currents exceeding 5 mA/cm(2) and a BHJ device efficiency close to 1% were achieved when device morphology was improved with diiodooctane as a solvent additive. This is the highest power conversion efficiency achieved by an acene-containing polymer so far.

• 出版日期2010-8-10