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Oriented phosphorescent emitters boost OLED efficiency
- Publication Year :
- 2011
-
Abstract
- The orientation distribution of the emissive sites in a phosphorescent Organic LED has been measured utilizing two independent optical methods. In contradiction to common expectations we find a clearly non-isotropic, predominantly parallel emitter orientation in the well-known triplet emitting guest–host system of Ir(MDQ) 2 (acac) blended in an α-NPD matrix. This result emphasizes the necessity of more sophisticated assumptions on active emitter properties in quantitative optical OLED analysis, and demonstrates a highly promising approach for OLED efficiency optimization.
- Subjects :
- organic light emitting diode
Materials science
Photoluminescence
business.industry
General Chemistry
phosphorescent emitter
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Biomaterials
emitter orientation
in-situ characterization
Materials Chemistry
OLED
Optoelectronics
ddc:530
photoluminescence
Electrical and Electronic Engineering
business
Phosphorescence
Common emitter
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....a2595d0c41d4ce06276735f323e37803