Bipolar anthracene derivatives containing hole- and electron-transporting moieties for highly efficient blue electroluminescence devices

Jinhai Huang, Jian Hua Su, Xin Li, Mei Ki Lam, Ka Man Fung, Hai Hua Fan, Kok Wai CHEAH, Chin H. Chen, He Tian*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

171 Citations (Scopus)

Abstract

A series of bipolar anthracene derivatives containing hole-transporting triphenylamine and electron-transporting benzimidazole moieties were synthesized and characterized. These compounds possess high thermal properties and quantum yield in toluene solution but their photoluminescence spectra are sensitive to the polarity of the solvent. Three types of devices were fabricated to investigate their electron-transporting and hole-transporting as well as light-emitting properties. The electroluminescence spectra for the three derivatives B1, B3 and B4 show that they emit blue light, while the B2-based devices produced white light at a low current density because of the electromer formation. Moreover, a single layer OLED device for B4 exhibited a current efficiency of 3.33 cd A-1 with a pure blue color of CIE (x,y) of (0.16, 0.16) at 20 mA cm-2 and a maximum brightness of 8472 cd m-2 at 8.7 V.

Original languageEnglish
Pages (from-to)2957-2964
Number of pages8
JournalJournal of Materials Chemistry
Volume21
Issue number9
DOIs
Publication statusPublished - 7 Mar 2011

Scopus Subject Areas

  • Chemistry(all)
  • Materials Chemistry

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