A triphenylamine substituted quinacridone derivative for solution processed organic light emitting diodes

M. Pilz da Cunha, T.T. Do, S.D. Yambem, H.D. Pham, S. Chang, S. Manzhos, R. Katoh, P. Sonar

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)
4 Downloads (Pure)

Abstract

We report on a novel quinacridone derivative design, namely, 2,9-bis(4-(bis(4-methoxyphenyl)amino)phenyl)-5,12-bis(2-ethylhexyl)-5,12-dihydroquinolino[2,3-b]acridine-7,14-dione (TPA-QA-TPA) for possible use as a solution processable emissive layer in organic light emitting diodes (OLEDs). TPA-QA-TPA contains branched alkyl chains for enhanced solubility and methoxytriphenylamine moieties (TPA) as end capping groups. The end capping groups not only extend the molecular conjugation leading to a red shifted emission, but have a propeller shaped conformation. The propeller design hinders the intermolecular π-π stacking, hindering aggregation and hence suppressing concentration quenching of the fluorophores in the solid state. The new molecular design shows good thermal stability, with a decomposition temperature of 390 °C and a melting temperature of 295 °C. The absorption and emission maxima for TPA-QA-TPA compound are 552 and 622 nm respectively. Using TPA-QA-TPA as a dopant in tris(8-hydroxyquinolinato)aluminum (Alq3), organic light emitting diodes were realized in a simple device structure.

Original languageEnglish
Pages (from-to)56-63
Number of pages8
JournalMaterials Chemistry and Physics
Volume206
DOIs
Publication statusPublished - 15 Feb 2018

Keywords

  • Fluorescence
  • Organic light emitting diode
  • Quinacridone
  • Solution process
  • Triphenylamine

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