Harnessing white-light luminescence via tunable singlet-and triplet-derived emissions based on gold(III) complexes *

Michael Bachmann, Olivier Blacque, Koushik Venkatesan*

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

White light emitting gold(III) complexes were synthesized by tuning the percentage of metal dπ contribution in the charge transfer. This was achieved through specific tailoring of the ligand scaffold, which led to increase in the HOMO π-energy properties, resulting in a decrease of efficiency on the intersystem crossing (ISC). As a consequence, monomolecular based singlet- and triplet-derived emission covering the entire visible spectrum with quantum yield up to 28 % and CIE-1931 chromaticity coordinates of (0.29, 0.33) to (0.32, 0.40) could be obtained. Furthermore, two complexes displayed excitation-dependent emission property due to hyper-ISC allowing the regulation of the ratio between fluorescence versus phosphorescence intensity and accomplish precise tuning of white light emission.

Original languageEnglish
Pages (from-to)9451-9456
Number of pages6
JournalChemistry - A European Journal
Volume23
Issue number40
DOIs
Publication statusPublished - 18 Jul 2017

Keywords

  • cyclometalation
  • dual emission
  • fluorescence
  • gold
  • phosphorescence
  • white light

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