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66.3: Hybrid White OLEDs for General Lighting
Author(s) -
Loebl Peter,
Goldmann Claudia,
Elsbergen Volker,
Grabowski Stefan,
Boerner Herbert,
Bertram Dietrich
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 - 10.1889/1.3621506
Subject(s) - materials science , extractor , optoelectronics , coupling (piping) , oled , macro , foil method , optics , layer (electronics) , computer science , physics , composite material , engineering , process engineering , programming language
OLEDs for general lighting require both high efficacy and good lumen maintenance. Hybrid stacks combining fluorescent blue and phosphorescent red and green emitters are a very good choice for both long lifetime and good efficacy values: 31 lm/W are demonstrated for a cold white color point. 44 lm /W are measured with improved out‐coupling (ILO) using a scattering foil and 60 lm/W are demonstrated using a macro‐extractor for light out‐coupling. For warm white we realized 34 lm/W (with ILO 45 lm/W and 64 lm /W using a macro‐extractor). LT 50 lumen maintenance is for both stacks better than 30,000 hours.