Effect of end group functionalisation of small molecules featuring the fluorene-thiophene-benzothiadiazole motif as emitters in solution-processed red and orange organic light-emitting diodes

Valentin H.K. Fell, Neil J. Findlay, Benjamin Breig, Clarissa Forbes, Anto R. Inigo, Joseph Cameron, Alexander L. Kanibolotsky, Peter J. Skabara

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A series of red fluorescent materials (compounds 1-4), which each contain the symmetric fluorene-thiophene-BT-thiophene-fluorene core, is presented along with their performance in solution-processed OLED devices. Extending the molecular conjugation through end-capping with additional fluorene units (compound 2), or through incorporation of donor functionalities (compounds 3 and 4) improves OLED performance relative to the parent compound 1. Notably, incorporating triphenylamine donor groups in compound 3 led to solution-processed OLED devices operating with a peak luminance of 2888 cd m −2 and a low turn-on voltage (3.6 V).

Original languageEnglish
Pages (from-to)3934-3944
Number of pages11
JournalJournal of Materials Chemistry C
Volume7
Issue number13
DOIs
Publication statusPublished - 4 Mar 2019

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Keywords

  • end group functionalisation
  • small molecules
  • organic light-emitting diodes
  • fluorene–thiophene–benzothiadiazole motif

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