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

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• 作者：Ying Jiang ; Toshihiro Okamoto ; Hector A. Becerril ; Sanghyun Hong ; Ming Lee Tang ; Alex C. Mayer ; Jack E. Parmer ; Michael D. McGehee ; Zhenan Bao
• 刊名：Macromolecules
• 出版年：2010
• 出版时间：August 10, 2010
• 年：2010
• 卷：43
• 期：15
• 页码：6361-6367
• 全文大小：947K
• 年卷期：v.43,no.15(August 10, 2010)
• ISSN：1520-5835

文摘

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 10⁵ cm⁻¹, an order of magnitude higher than previously reported anthradithiophene−dialkylfluorene copolymers. Short-circuit currents exceeding 5 mA/cm² 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.