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Electrical and optical properties of white organic light‐emitting devices using blue and orange phosphorescent materials
Author(s) -
Seo YuSeok,
Moon DaeGyu
Publication year - 2010
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid18.11.1010
Subject(s) - phosphorescence , electroluminescence , materials science , doping , optoelectronics , oled , orange (colour) , optics , fluorescence , nanotechnology , physics , layer (electronics)
— Highly efficient white organic light‐emitting devices have been fabricated by doping phosphorescent orange and blue emitters into the separate layers of a single host. The efficiency and electroluminescence spectrum were strongly affected by the sequence of doped layers. The phosphorescent white devices exhibiting high efficiency and reasonable white balances are obtained when the recombination region is overlapped by the blue doped region. By using this principle, a simple structured phosphorescent white device with a peak power efficiency of 40.7 lm/W and Commission International de L'Eclairage coordinates of (0.43, 0.42) have been demonstrated.