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72.2: Phosphorescent OLEDs: Enabling Solid State Lighting with Lower Temperature and Longer Lifetime
Author(s) -
Levermore Peter A.,
Dyatkin Alexey B.,
Elshenawy Zeinab M.,
Pang Huiqing,
Kwong Raymond C.,
Ma Ruiqing,
Weaver Michael S.,
Brown Julie J.
Publication year - 2011
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 - 10.1889/1.3621006
Subject(s) - phosphorescence , oled , materials science , luminance , optoelectronics , flat panel , solid state lighting , optics , fluorescence , light emitting diode , physics , nanotechnology , layer (electronics)
We present a pair of 15 cm × 15 cm all‐phosphorescent OLED light panels with high efficacy and extended operational lifetime. Panel 1 operates at 1,000 cd/m 2 with power efficacy = 62 lm/W. At a higher luminance of 3,000 cd/m 2 , power efficacy = 49 lm/W, CRI = 82, CCT = 2,950 K and CIE 1931 (x, y) = (0.446, 0.417). Similar high efficacy performance is recorded for Panel 2, which has lifetime to LT70 ∼ 4,000 hrs at 3,000 cd/m 2 . Excellent lifetime is enabled by a new light blue phosphorescent materials system and by the use of efficient phosphorescent emitters that ensure very low panel temperature without any additional thermal management.