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

doi:10.1021/ol9008816

Novel oligo-9,9'-spirobifluorenes through ortho-linkage as full hydrocarbon host for highly efficient phosphorescent OLEDs

Org Lett. 2009 Jun 18;11(12):2607-10. doi: 10.1021/ol9008816.

Authors

Zuoquan Jiang¹, Haiqing Yao, Zhiqiang Zhang, Chuluo Yang, Zhongyin Liu, Youtian Tao, Jingui Qin, Dongge Ma

Affiliation

¹ Department of Chemistry, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, PR China.

PMID: 19459696
DOI: 10.1021/ol9008816

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 Ir(ppy)(3) or (ppq)(2)Ir(acac) as the triplet emitter show maximum external quantum efficiencies of 12.6 and 10.5% for green and red electrophosphorescence, respectively.