A Dibenzofuran-Based Host Material for Blue Electrophosphorescence

A Dibenzofuran-Based Host Material for Blue Electrophosphorescence

Dibenzofuran (DBF) is converted to a vacuum-sublimable, electron-transporting host material via 2,8-substitution with diphenylphosphine oxide moieties. Close π−π stacking and the inductive influence of PO moieties impart favorable electron-transport properties without lowering the triplet energy. A...

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Veröffentlicht in:Organic Letters, 8(19):4211-4214 8(19):4211-4214, 2006-09, Vol.8 (19), p.4211-4214
Hauptverfasser: Vecchi, Paul A, Padmaperuma, Asanga B, Qiao, Hong, Sapochak, Linda S, Burrows, Paul E
Format: Artikel
Sprache:eng
Schlagworte:
10 SYNTHETIC FUELS
ARGON
BROMINATION
BROMINE
CHLOROFORM
light emitting device
LITHIUM
METHANOL
METHYLENE CHLORIDE
OLED
organometallic
PURIFICATION
TETRAHYDROFURAN
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Zusammenfassung:Dibenzofuran (DBF) is converted to a vacuum-sublimable, electron-transporting host material via 2,8-substitution with diphenylphosphine oxide moieties. Close π−π stacking and the inductive influence of PO moieties impart favorable electron-transport properties without lowering the triplet energy. A maximum external quantum efficiency of 10.1% and luminance power efficiency of 25.9 lm/W are realized using this material as the host for the blue-green electrophosphorescent molecule, iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-N,C 2‘)picolinate (FIrpic).
ISSN:1523-7060
1523-7052
DOI:10.1021/ol0614121