Thumbnail
Access Restriction
Open

Author Higgins, R. W. T. ♦ Monkman, A. P. ♦ Nothofer, H. -G. ♦ Scherf, U.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword NUCLEAR PHYSICS AND RADIATION PHYSICS ♦ ANNIHILATION ♦ BRIGHTNESS ♦ CURRENT DENSITY ♦ ENERGY TRANSFER ♦ LUMINESCENCE ♦ POLYMERS ♦ QUANTUM EFFICIENCY ♦ TRANSPORT ♦ TRIPLETS ♦ 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.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-08-06
Publisher Place United States
Journal Applied Physics Letters
Volume Number 79
Issue Number 6


Open content in new tab

   Open content in new tab