Conjugated polymers based on C, Si and N-bridged dithiophene and thienopyrroledione units : synthesis, field-effect transistors and bulk heterojunction polymer solar cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yong Zhang
  • Jingyu Zou
  • Ying Sun
  • Josh A. Davies
  • Kung-Shih Chen
  • Orb Acton

Detail(s)

Original languageEnglish
Pages (from-to)3895-3902
Journal / PublicationJournal of Materials Chemistry
Volume21
Issue number11
Online published27 Jan 2011
Publication statusPublished - 21 Mar 2011
Externally publishedYes

Abstract

A series of low band-gap conjugated polymers (PDTC, PDTSi and PDTP) containing electron-rich C-, Si-, and N-bridged bithiophene and electron-deficient thienopyrroledione units were synthesized via Stille coupling polymerization. All these polymers possess a low-lying energy level for the highest occupied molecular orbital (HOMO) (as low as -5.44 eV). As a result, photovoltaic devices derived from these polymers show high open circuit voltage (Voc as high as 0.91 V). These rigid polymers also possess respectable hole mobilities of 1.50 × 10-3, 6.0 × 10-4, and 3.9 × 10-4 cm2 V-1 s-1 for PDTC, PDTSi, and PDTP, respectively. The combined high Voc and good hole mobility enable bulk hetero-junction photovoltaic cells to be fabricated with relatively high power conversion efficiency (PCE as high as 3.74% for the PDTC-based device). © The Royal Society of Chemistry 2011.

Citation Format(s)

Conjugated polymers based on C, Si and N-bridged dithiophene and thienopyrroledione units : synthesis, field-effect transistors and bulk heterojunction polymer solar cells. / Zhang, Yong; Zou, Jingyu; Yip, Hin-Lap; Sun, Ying; Davies, Josh A.; Chen, Kung-Shih; Acton, Orb; Jen, Alex K.-Y.

In: Journal of Materials Chemistry, Vol. 21, No. 11, 21.03.2011, p. 3895-3902.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review