Oriented phosphorescent emitters boost OLED efficiency
By M. Flämmich, J. Frischeisen, D. Setz, D. Michaelis, B. Krummacher, T. Schmidt, Wolfgang Brütting, N. Danz. 2011
172 citations recorded by the source corpus.
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.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/ff8bb7bc08758117c60bf5ff0809c1e7e73e0bda
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Electrical and Electronic Engineering
In Materials Chemistry
Citations in the corpus
- Recent advances in light outcoupling from white organic light-emitting diodes (2015, methodology): “Flämmich et al. then reported on a more accurate method to measure the orientation of emissive dipoles in an electrically driven OLED.77 Shortly thereafter, Frischeisen et al. demonstrated that in fluorescent, small molecule OLEDs, horizontal emitter orientation can indeed increase outcoupling effic”
- Device efficiency of organic light‐emitting diodes: Progress by improved light outcoupling (2013, background): “[77] nonisotropic emitter orientation might at least partially contribute to the high EQE values as will be discussed at the end of this article [58,68].”