Two-dimensional benzodithiophene and benzothiadiazole based solution-processed small molecular organic field-effect transistors & solar cells

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

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Author(s)

  • Yanhua Chen
  • Yan Yan
  • Zhengkun Du
  • Xichang Bao
  • Qian Liu
  • Mingliang Sun
  • Renqiang Yang

Detail(s)

Original languageEnglish
Pages (from-to)3921-3927
Journal / PublicationJournal of Materials Chemistry C
Volume2
Issue number20
Publication statusPublished - 28 May 2014

Abstract

Benzodithiophene (BDT) and benzothiadiazole (BT) based small molecules have been synthesized through palladium-catalyzed Stille coupling reactions. The molecules with and without the conjugated thiophene side-chain were named as DRTBTTBDTT (2D) and DRTBTTBDT (1D), respectively. These molecules exhibited an optical band gap of around 1.8 eV. Solution-processed thin films of 1D and 2D showed that the conjugated thiophene side-chain oriented to produce a uniform 2D structure, which led to a relatively high hole mobility of 0.016 cm2 V-1 s-1, and this was one of the highest values for solution-processed small-molecule donors in organic solar cells (OSCs). With proper engineering of energy levels, the organic solar cells based on DRTBTTBDTT (2D) as donors exhibited a high Voc of around 0.9 V. © 2014 the Partner Organisations.

Citation Format(s)

Two-dimensional benzodithiophene and benzothiadiazole based solution-processed small molecular organic field-effect transistors & solar cells. / Chen, Yanhua; Yan, Yan; Du, Zhengkun; Bao, Xichang; Liu, Qian; Roy, V. A L; Sun, Mingliang; Yang, Renqiang; Lee, Chun Sing.

In: Journal of Materials Chemistry C, Vol. 2, No. 20, 28.05.2014, p. 3921-3927.

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