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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

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·PF 6 . 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
StatePublished - 28 Mar 2011

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