Spin effects on the luminescence yield of organic light emitting diodes

Alexander L. Burin, Mark A Ratner

Research output: Contribution to journalArticle

51 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 - 1998

Fingerprint

Organic light emitting diodes (OLED)
Quantum yield
Luminescence
light emitting diodes
Fluorescence
luminescence
Molecules
Light emitting diodes
fluorescence
radiative recombination
molecules
decay
estimates
excitation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Spin effects on the luminescence yield of organic light emitting diodes. / Burin, Alexander L.; Ratner, Mark A.

In: Journal of Chemical Physics, Vol. 109, No. 14, 1998, p. 6092-6102.

Research output: Contribution to journalArticle

@article{4b95c1a13d4147c7ac480ad3233e6f14,
title = "Spin effects on the luminescence yield of organic light emitting diodes",
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.",
author = "Burin, {Alexander L.} and Ratner, {Mark A}",
year = "1998",
doi = "10.1063/1.477236",
language = "English",
volume = "109",
pages = "6092--6102",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "14",

}

TY - JOUR

T1 - Spin effects on the luminescence yield of organic light emitting diodes

AU - Burin, Alexander L.

AU - Ratner, Mark A

PY - 1998

Y1 - 1998

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0032497454&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032497454&partnerID=8YFLogxK

U2 - 10.1063/1.477236

DO - 10.1063/1.477236

M3 - Article

VL - 109

SP - 6092

EP - 6102

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 14

ER -