Novel oligo-9.9-spirobifluorenes through ortho-linkage as full hydrocarbon host for highly efficient phosphorescent oleds

Zuoquan Jiang, Haiqing Yao, Zhiqiang Zhang, Chuluo Yang, Zhongyin Liu, Youtian Tao, Jingui Qin, Dongge Ma

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

4-Bromo-9,9′-spirobifluorene is facilely synthesized, and from this precursor, two ortho-linked oligo-9,9′-spirobifluorenes, 44BSF and 24TSF, are constructed. Devices with 24TSF as the full-hydrocarbon host material and lr(ppy)3 or (ppq)2lr(acac) as the triplet emitter show maximum external quantum efficiencies of 12.6 and 10.5% for green and red electrophosphorescence, respectively.

Original languageEnglish
Pages (from-to)2607-2610
Number of pages4
JournalOrganic Letters
Volume11
Issue number12
DOIs
StatePublished - 18 Jun 2009
Externally publishedYes

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