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

Ying Jiang, Toshihiro Okamoto, Hector A. Becerril, Sanghyun Hong, Ming Lee Tang, Alex C. Mayer, Jack E. Parmer, Michael D. McGehee, Zhenan Bao

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

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. © 2010 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)6361-6367
Number of pages7
JournalMacromolecules
Volume43
Issue number15
DOIs
StatePublished - Aug 10 2010
Externally publishedYes

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