Novel Oligo-9,9′-spirobifluorenes through ortho-Linkage as Full Hydrocarbon Host for Highly Efficient Phosphorescent OLEDs
Organic Letters2009Vol. 11(12), pp. 2607–2610
Citations Over TimeTop 10% of 2009 papers
Zuo‐Quan Jiang, Haiqing Yao, Zhiqiang Zhang, Chuluo Yang, Zhongyin Liu, Youtian Tao, Jingui Qin, Dongge Ma
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.
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