Solution-processed blue and blue-green phosphorescent organic light-emitting devices using iridium(III) complexes based on 9-(6-(4-phenyl-1H-1,2,3-triazol-1-yl)hexyl)-9H–carbazole ligand

Huixia Xu*, Peng Sun, Kexiang Wang, Xiaolin Zhang, Jingkun Ren, Tingting Yang, Xinwen Zhang, Yuying Hao, Hua Wang, Bingshe Xu, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

9 Citations (Scopus)

Abstract

We have designed and successfully synthesized a series of solution-processed iridium(III) complexes of (Czphtz)2Ir(NˆN) bearing main ligand of 9-(6-(4-phenyl-1H-1,2,3 -triazol-1-yl)hexyl)-9H-carbazole, namely (Czphtz)2Ir(tfmptz) (Ir1) (Czphtz)2Ir(pptz) (Ir2) and (Czphtz)2Ir(fpptz) (Ir3). The hole-transporting carbazole and electron-transporting 1, 2, 4-trizole moieties were introduced through hexyl to balance carrier transport. The solution-processed host-free and doped phosphorescent organic light-emitting devices (PhOLEDs) were fabricated. Here, in this paper, we will present the photophysical, electrochemical properties and performances in devices of three complexes. All of them exhibit excellent solubilities in common organic solvents. The pure-blue-light-emitting Ir1 with the maximum emission peak at 463 nm was attained by varying the structure of ancillary ligand and have the CIE coordinate of (0.19, 0.18) in host-free PhOLED. Our work shows that the rational structure modification of ancillary ligand is an effective approach to develop deep blue-light-emitting materials.

Original languageEnglish
Pages (from-to)148-154
Number of pages7
JournalDyes and Pigments
Volume134
DOIs
Publication statusPublished - 1 Nov 2016

Scopus Subject Areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

User-Defined Keywords

  • 1
  • 2
  • 4-trizole derivatives
  • Carbazole
  • Pure-blue Iridium(III) Complex

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