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Highly efficient tris(8-hydroxyquinoline) aluminum-based organic light-emitting diodes utilized by balanced energy transfer with cosensitizing fluorescent dyes
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16.See EPAPS supplementary material at http://dx.doi.org/10.1063/1.3243689 for clarity of multiple emission of multiple dopants in graded configuration, the photoluminescence time resolved emission spectroscopy (TRES) of codoped thin films is performed. The Fig. s-1 in supplemental shows the TRES spectra which is the direct evidence of energy transfer, and it supports the explanations.[Supplementary Material]
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/content/aip/journal/apl/95/14/10.1063/1.3243689
2009-10-09
2014-07-31

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 is demonstrated, which realized theoretical limits of 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.

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Scitation: Highly efficient tris(8-hydroxyquinoline) aluminum-based organic light-emitting diodes utilized by balanced energy transfer with cosensitizing fluorescent dyes
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/14/10.1063/1.3243689
10.1063/1.3243689
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