An ionic terfluorene derivative for saturated deep-blue solid state light-emitting electrochemical cells

Hsiao Fan Chen, Chih Teng Liao, Te Chuan Chen, Hai Ching Su, Ken Tsung Wong, Tzung Fang Guo

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

In this study, we obtained saturated deep-blue electroluminescence (EL) from solid state light-emitting electrochemical cells (LECs) incorporating the ionic terfluorene derivative 1, which we synthesized through covalent tethering of methylimidazolium moieties as pendent groups of terfluorene. Compound 1 exhibited the deep-blue emission, extremely high quantum yield, and reversible redox behavior that are characteristic of terfluorene derivatives. LEC devices incorporating terfluorene 1 exhibited deep-blue EL with CIE coordinates of (0.159, 0.115) and (0.151, 0.122) in the absence and presence, respectively, of the ionic liquid (IL) BMIM·PF6. The peak external quantum efficiency and peak power efficiency of 1 in the presence of the IL reached 1.14% and 1.24 lm W-1, respectively. These CIE coordinates are the most saturated blue emissions ever reported for LECs.

Original languageEnglish
Pages (from-to)4175-4181
Number of pages7
JournalJournal of Materials Chemistry
Volume21
Issue number12
DOIs
Publication statusPublished - 2011 Mar 28

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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