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Materials 2013, 6(3), 886-896; doi:10.3390/ma6030886
Article

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

1,2
,
1
,
1,2,3,*  and 3,*
1 Department of Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004, China 2 Department of Physics, Fudan University, Shanghai 321004, China 3 Office of the Chancellor and Center for Nanoscience, Departments of Chemistry & Biochemistry and Physics & Astronomy, University of Missouri—St. Louis, St. Louis, MO 63121, USA
* Authors to whom correspondence should be addressed.
Received: 16 November 2012 / Revised: 21 February 2013 / Accepted: 27 February 2013 / Published: 6 March 2013
(This article belongs to the Special Issue Conjugated Polymers 2012)
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Abstract

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.
Keywords: light-emitting diodes; polymers; excitons light-emitting diodes; polymers; excitons
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Chen, R.-A.; Wang, C.; Li, S.; George, T.F. Electronic Two-Transition-Induced Enhancement of Emission Efficiency in Polymer Light-Emitting Diodes. Materials 2013, 6, 886-896.

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