Theoretical design study on the electronic structures and phosphorescent properties of four iridium(III) complexes

Deming Han, Xiaohong Shang, Gang Zhang, Lihui Zhao

Research output: Contribution to journalArticle

Abstract

The geometry structures, electronic structures, absorption, and phosphorescent properties of four Ir(III) complexes have been investigated using the density functional method. Calculations of ionization potential (IP) and electron affinity (EA) were used to evaluate the injection abilities of holes and electrons into these complexes. The result also indicates that the -CF 3 substituent group on the ligand not only change the character of transition but affect the rate and balance of charge transfer. The lowest energy absorption wavelengths are located at 428 nm for 1a, 446 nm for 1b, 385 nm for 2a, and 399 nm for 2b, respectively, in good agreement with the energy gap (ΔEL-H) trend because the HOMO-LUMO transition configurations are predominantly responsible for the S0→S1 transition. 2b has the 433 nm blue emission, which might be a potential candidate for blue emitters in phosphorescent dopant emitters in organic light emitting diodes (OLEDs). The study could provide constructive information for designing novel OLEDs materials in the future.[Supplemental materials are available for this article. Go to the publisher's online edition of Molecular Crystals and Liquid Crystals to view the free supplemental file.]

Original languageEnglish (US)
Pages (from-to)237-248
Number of pages12
JournalMolecular crystals and liquid crystals
Volume592
Issue number1
DOIs
StatePublished - Mar 24 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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