Triphenylsilane-substituted arenes as host materials for use in green phosphorescent organic light emitting diodes

초록

We demonstrated triphenylsilane-substituted arenes (1-4) as host materials for green phosphorescent organic light-emitting diodes. Particularly, a device using 9,9-dimethyl-2-(triphenylsilyl)-7-[4-(triphenylsilyl)phenyl]-9H-fluorene (compound 4) as the host material with the green phosphorescence dopant bis[2-(1,1',2',1 ''-terphen-3-yl)pyridinato-C,N]iridium(III)(acetylacetonate) showed the efficient green emission with an external quantum efficiency of 4.64%, a power efficiency of 7.2 lm/W and luminous efficiency of 16.6 cd/A at 20 mA/cm(2), respectively, with the Commission International de L'Eclairage chromaticity coordinates of (033, 0.59) at 8.0 V. (C) 2015 Elsevier B.V. All rights reserved.

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