Synthesis and Characterization of New Dibenzothiophene-based Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes

Hyung Jong Kim, Ik Rang Choe, Tae Ryang Hong, Ju Sik Kang, Hyun Ah Um, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticle


A series of bipolar host materials containing dibenzo[b,d]thiophene (DBT) or dibenzo[b,d]thiophene 5,5-dioxide core were successfully synthesized, and their physical, photophysical, and electrochemical properties were investigated. The three host materials showed well-localized electron distribution at the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) states, as evidenced by theoretical calculations. Triplet energies of the new host materials are higher than 2.6 eV, and the blend film with bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic) as a blue phosphorescent dopant showed highly efficient energy transfer between the host material and dopant.

Original languageEnglish
Pages (from-to)31-39
Number of pages9
JournalMolecular Crystals and Liquid Crystals
Issue number1
Publication statusPublished - 2015 Nov 2



  • bipolar host material
  • energy transfer
  • phosphorescence
  • triplet energy

ASJC Scopus subject areas

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

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