Article ID Journal Published Year Pages File Type
1809942 Physica B: Condensed Matter 2013 5 Pages PDF
Abstract

Within a Su–Schrieffer–Heeger model modified to include an external electric field, the dynamical process of oppositely charged polarons in a polymer chain is simulated by using a non-adiabatic evolution method. It is found that the polaron pair can combine with neutral exciton in the presence of a weak electric field, and the field requirement for achieving exciton is very strict in a pure polymer chain. But under the assistance of impurities, the exciton can be produced under a wide range of applied field strengths. The yield of neutral exciton can reach as high as 96%, which is significant for electroluminescent efficiency of OLEDs.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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