Facile synthesis of annulated benzothiadiazole derivatives and their application as medium band gap acceptors in organic photovoltaic devices

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

5 Scopus Citations
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Author(s)

  • Xiantao Hu
  • Ram Datt
  • Qiao He
  • Panagiota Kafourou
  • Harrison Ka Hin Lee
  • And 3 others
  • Andrew J. P. White
  • Wing Chung Tsoi
  • Martin Heeney

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)9249-9256
Journal / PublicationJournal of Materials Chemistry C
Volume10
Issue number24
Online published8 Jun 2022
Publication statusPublished - 28 Jun 2022

Link(s)

Abstract

Two 2,1,3-benzothiadiazole derivatives annulated with 2-(1,3-dithiol-2-ylidene)malonitrile in the 4,5-positions were prepared by nucleophilic substitution reactions of a fluorinated precursor. The resulting derivatives were coupled to an electron rich indacenodithiophene core to afford two new non-fullerene acceptors (NFAs). Both NFAs exhibited identical absorption spectra in solution, but significant differences in the solid state as a result of the end group fluorination. Both materials performed as electron acceptors in solar cell blends with donor polymers. The resulting devices exhibited high open circuit voltages over 1 V under 1 sun illumination, as a result of their high lying LUMO levels. Devices based on the fluorinated acceptor demonstrated reasonable performance under low light conditions, with power conversion efficiencies up to 13.7%.

Research Area(s)

  • FLUORINATED HETEROCYCLIC-COMPOUNDS, POLYMER, SUBSTITUENTS, PERFORMANCE, EFFICIENCY, SEMICONDUCTORS, MOLECULES

Citation Format(s)

Facile synthesis of annulated benzothiadiazole derivatives and their application as medium band gap acceptors in organic photovoltaic devices. / Hu, Xiantao; Datt, Ram; He, Qiao et al.
In: Journal of Materials Chemistry C, Vol. 10, No. 24, 28.06.2022, p. 9249-9256.

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

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