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 language | English |
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Pages (from-to) | 2607-2610 |
Number of pages | 4 |
Journal | Organic Letters |
Volume | 11 |
Issue number | 12 |
DOIs | |
State | Published - 18 Jun 2009 |
Externally published | Yes |