Harnessing Triplet Excited States by Fluorescent Dopant Utilizing Codoped Phosphorescent Dopant in Exciplex Host for Efficient Fluorescent Organic Light Emitting Diodes

The singlet fraction of excitons on a conventional fluorescent emitter is increased by reverse intersystem crossing of exciplexes and the sensitization effect of phosphorescent materials. Consequently, a red fluorescent organic light‐emitting diode (OLED) with an external quantum efficiency (EQE) of...

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Bibliographic Details
Published in:Advanced optical materials 2017-02, Vol.5 (3), p.np-n/a
Main Authors: Kim, Hyun‐Gu, Kim, Kwon‐Hyeon, Moon, Chang‐Ki, Kim, Jang‐Joo
Format: Article
Language:English
Subjects:
conventional fluorescent emitters
Decay
Dopants
Emitters
exciplexes
Excitons
Fluorescence
fluorescent OLEDs
Optics
Organic light emitting diodes
Phosphorescence
phosphorescent materials
reverse intersystem crossing
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Summary:The singlet fraction of excitons on a conventional fluorescent emitter is increased by reverse intersystem crossing of exciplexes and the sensitization effect of phosphorescent materials. Consequently, a red fluorescent organic light‐emitting diode (OLED) with an external quantum efficiency (EQE) of 23.7% is realized and an EQE of nearly 30% may be expected if all singlet excitons in the fluorescent emitter decay radiatively.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.201600749