Spin effects on the luminescence yield of organic light emitting diodes

Alexander L. Burin; Mark A. Ratner

doi:10.1063/1.477236

Spin effects on the luminescence yield of organic light emitting diodes

Alexander L. Burin^*, Mark A. Ratner

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article

52 Scopus citations

Abstract

The influence of the excitation spectrum on the quantum yield is investigated for organic molecules used in light emitting diodes (LEDs). The significance of the competition between radiative and nonradiative recombination channels is pointed out. A system of master equations is proposed to describe the relaxation of lower levels of the excited molecule, and the solution for the fluorescence yield is obtained assuming relatively weak vibronic coupling. The results are used to interpret the experimental data in oligothiophenes, and general approaches are proposed to increase the relative weight of the radiative decay channel and correspondingly enhance the working properties of organic light emitting diodes. In particular, the fluorescence quantum yield can exceed the simple estimate of 0.25.

Original language	English (US)
Pages (from-to)	6092-6102
Number of pages	11
Journal	Journal of Chemical Physics
Volume	109
Issue number	14
DOIs	https://doi.org/10.1063/1.477236
State	Published - Dec 1 1998

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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Burin, A. L., & Ratner, M. A. (1998). Spin effects on the luminescence yield of organic light emitting diodes. Journal of Chemical Physics, 109(14), 6092-6102. https://doi.org/10.1063/1.477236

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