Electronic Two-Transition-Induced Enhancement of Emission Efficiency in Polymer Light-Emitting Diodes

With the development of experimental techniques, effective injection and transportation of electrons is proven as a way to obtain polymer light-emitting diodes (PLEDs) with high quantum efficiency. This paper reveals a valid mechanism for the enhancement of quantum efficiency in PLEDs. When an exter...

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Bibliographic Details
Published in:Materials 2013-03, Vol.6 (3), p.886-896
Main Authors: Chen, Ren-Ai, Wang, Cong, Li, Sheng, George, Thomas F
Format: Article
Language:English
Subjects:
Efficiency
Electric fields
Light emitting diodes
Physics
Polymers
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Summary:With the development of experimental techniques, effective injection and transportation of electrons is proven as a way to obtain polymer light-emitting diodes (PLEDs) with high quantum efficiency. This paper reveals a valid mechanism for the enhancement of quantum efficiency in PLEDs. When an external electric field is applied, the interaction between a negative polaron and triplet exciton leads to an electronic two-transition process, which induces the exciton to emit light and thus improve the emission efficiency of PLEDs.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma6030886