Impact of regioregularity on thin-film transistor and photovoltaic cell performances of pentacene-containing polymers

Ying Jiang, Sanghyun Hong, Joon Hak Oh, Rajib Mondal, Toshihiro Okamoto, Eric Verploegen, Michael F. Toney, Michael D. McGehee, Zhenan Bao

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Regioregular pentacene-containing polymers were synthesized with alkylated bithiophene (BT) and cyclopentadithiophene (CPDT) as comonomers. Among them, 2,9-conjugated polymers PnBT-2,9 and PnCPDT-2,9 achieved the best performance in transistor and photovoltaic devices respectively. The former achieved the most highly ordered structures in thin films, yielding ambipolar transistor behavior with hole and electron mobilities up to 0.03 and 0.02 cm 2 V -1 s -1 on octadecylsilane-treated substrates. The latter achieved photovoltaic power conversion efficiencies up to 0.33%. The impact of regioregularity and direction of conjugation-extension (2,9 vs. 2,10), on thin-film order and device performance has been demonstrated for the pentacene-containing polymers for the first time, providing insight towards future functional material design. © 2012 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)4356
JournalJournal of Materials Chemistry
Volume22
Issue number10
DOIs
StatePublished - 2012
Externally publishedYes

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