skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning

Abstract

Efficient, white emission with Commission Internationale de L'Eclairage coordinates of 0.33, 0.42 is demonstrated from polymer light-emitting diodes operating at high brightness. An amino endcapped polyfluorene derivative doped with rubrene was used as the active layer, in combination with a poly(3,4-ethylenedioxythiophene) hole transport layer. Luminescence reaches 14950 Cd/m{sup 2} at a current density of 150 mA/cm{sup 2}, and the maximum external quantum efficiency measured 1.05% for a bias voltage of 9.0 V. We observe a fall in external quantum efficiency relative to the undoped device, which we ascribe to an increased singlet--triplet annihilation rate at the dopant sites. {copyright} 2001 American Institute of Physics.

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40230728
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 79; Journal Issue: 6; Other Information: DOI: 10.1063/1.1389070; Othernumber: APPLAB000079000006000857000001; 034130APL; PBD: 6 Aug 2001; Journal ID: ISSN 0003-6951
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANNIHILATION; BRIGHTNESS; CURRENT DENSITY; ENERGY TRANSFER; LUMINESCENCE; POLYMERS; QUANTUM EFFICIENCY; TRANSPORT; TRIPLETS; TUNING

Citation Formats

Higgins, R W. T., Monkman, A P, Nothofer, H -G, and Scherf, U. Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning. United States: N. p., 2001. Web. doi:10.1063/1.1389070.
Higgins, R W. T., Monkman, A P, Nothofer, H -G, & Scherf, U. Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning. United States. doi:10.1063/1.1389070.
Higgins, R W. T., Monkman, A P, Nothofer, H -G, and Scherf, U. Mon . "Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning". United States. doi:10.1063/1.1389070.
@article{osti_40230728,
title = {Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning},
author = {Higgins, R W. T. and Monkman, A P and Nothofer, H -G and Scherf, U},
abstractNote = {Efficient, white emission with Commission Internationale de L'Eclairage coordinates of 0.33, 0.42 is demonstrated from polymer light-emitting diodes operating at high brightness. An amino endcapped polyfluorene derivative doped with rubrene was used as the active layer, in combination with a poly(3,4-ethylenedioxythiophene) hole transport layer. Luminescence reaches 14950 Cd/m{sup 2} at a current density of 150 mA/cm{sup 2}, and the maximum external quantum efficiency measured 1.05% for a bias voltage of 9.0 V. We observe a fall in external quantum efficiency relative to the undoped device, which we ascribe to an increased singlet--triplet annihilation rate at the dopant sites. {copyright} 2001 American Institute of Physics.},
doi = {10.1063/1.1389070},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 6,
volume = 79,
place = {United States},
year = {2001},
month = {8}
}