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P‐171: High‐Efficiency Low‐Voltage Phosphorescent OLED Devices with Mixed Host
Author(s) -
Kondakova Marina E.,
Deaton Joseph C.,
Kondakov Denis Y.,
Pawlik Thomas D.,
Young Ralph H.,
Brown Christopher T.,
Giesen David J.
Publication year - 2007
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 - 10.1889/1.2785438
Subject(s) - phosphorescence , oled , materials science , optoelectronics , carbazole , voltage , layer (electronics) , diode , host (biology) , low voltage , electrical efficiency , electrical engineering , nanotechnology , chemistry , power (physics) , photochemistry , physics , optics , fluorescence , engineering , ecology , quantum mechanics , biology
We demonstrate high‐efficiency, low‐voltage phosphorescent OLED devices (PHOLEDs) using mixed host materials in the light‐emitting layer (LEL) and novel formulations in the electrontransporting/ electron‐injecting layers (ETL/EIL). The LEL architecture offers significant improvement in efficiency and voltage compared to conventional phosphorescent OLEDs with carbazole‐based hosts. Further voltage reduction in our PHOLEDs is achieved through use of a novel material formulation in the ETL and EIL.