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33.3: Distinguished Student Paper : Improved Blue Phosphorescent OLEDs with a Linearly‐Graded Mixed Host Architecture
Author(s) -
Lee Sangmin,
Tang Ching W.,
Rothberg Lewis J.
Publication year - 2012
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2012.tb05811.x
Subject(s) - phosphorescence , host (biology) , oled , phosphor , quenching (fluorescence) , layer (electronics) , phosphorescent organic light emitting diode , materials science , optoelectronics , electron , physics , optics , nanotechnology , fluorescence , biology , ecology , quantum mechanics
A blue PhOLED with a linearly‐graded mixed host architecture is compared to a uniformly‐mixed host device. We show that the recombination region is moved into the interior of the emissive layer and results in higher efficiency through avoiding quenching of the phosphor by species in the electron transporting layer.