TITLE

Highly efficient tris(8-hydroxyquinoline) aluminum-based organic light-emitting diodes utilized by balanced energy transfer with cosensitizing fluorescent dyes

AUTHOR(S)
Park, Young Wook; Young Min Kim; Jin Hwan Choi; Park, Tae Hyun; Jin Woo Huh; Hong Suk Kim; Min Ju Cho; Dong Hoon Choi; Byeong-Kwon Ju
PUB. DATE
October 2009
SOURCE
Applied Physics Letters;10/5/2009, Vol. 95 Issue 14, p143305
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the development of highly efficient organic light-emitting diodes (OLEDs) utilized by balancing the energy transfer between multiple dopants, that is, multiple emissions from the multiple dopants were realized by balanced distributed energy transfer. From the cosensitizing fluorescent OLEDs, the peak external quantum efficiency (EQE) of 4.8% at 130 cd/m2 is demonstrated, which realized theoretical limits of ∼5.0% and means that nearly 100% of the singlet excitons are radiative. Also, the optimized device accompanying thickness-modulated electron transport layer for the enhanced light outcoupling demonstrated the highly improved peak EQE and current efficiency of 6.7%, and 23.4 cd/A.
ACCESSION #
44539671

 

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