Spin effects on the luminescence yield of organic light emitting diodes

Alexander L. Burin, Mark A. Ratner

Research output: Contribution to journalArticle

52 Citations (Scopus)

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 languageEnglish
Pages (from-to)6092-6102
Number of pages11
JournalJournal of Chemical Physics
Volume109
Issue number14
DOIs
Publication statusPublished - Dec 1 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Spin effects on the luminescence yield of organic light emitting diodes'. Together they form a unique fingerprint.

  • Cite this