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Simultaneous Realization of High EQE of 30%, Low Drive Voltage, and Low Efficiency Roll‐Off at High Brightness in Blue Phosphorescent OLEDs
Author(s) -
Udagawa Kazuo,
Sasabe Hisahiro,
Igarashi Fumiaki,
Kido Junji
Publication year - 2016
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201500462
Subject(s) - phosphorescence , brightness , realization (probability) , oled , low voltage , quantum efficiency , optoelectronics , materials science , electrical efficiency , computer science , service (business) , power (physics) , voltage , electrical engineering , physics , layer (electronics) , nanotechnology , optics , statistics , mathematics , engineering , quantum mechanics , economy , fluorescence , economics
A blue organic light‐emitting device that simultaneously realizes a driving voltage of 3.25 V, external quantum efficiency of 30%, and a power efficiency of 78 lm W −1 at 1000 cd m −2 is developed. By using a mixed‐host system, the device shows ≈1.4 times higher power efficiency than that of the corresponding double emission layer at a high brightness.