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

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

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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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) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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