Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00069 : Efficient blue PhOLEDs using host materials of lower triplet energy than the emitter
Author:
It is a commonly held view that the host material for a phosphorescent
emitter in an organic light emitting device (OLED) must have a triplet
energy higher than that of the phosphorescent emitter in order to obtain
high quantum efficiencies. We show that a combination of HTL, ETL and host
with appropriate energy levels can provide high external quantum efficiency
(EQE), even with a host triplet energy smaller than that of the emitter.
Specifically, we report results for a new host material,
4-(di-p-tolylamino)phenyl)diphenylphosphine oxide, with a triplet energy
lower than FIrpic that demonstrate improved OLED performance. Our results
suggest modified design rules for the development of new, high performance
host materials. Molecular design strategies, device design and OLED data
will be discussed.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.69
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