Barriers to electron extraction in polymer light-emitting diodes

Citation
K. Murata et al., Barriers to electron extraction in polymer light-emitting diodes, APPL PHYS L, 79(8), 2001, pp. 1193-1195
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
0003-6951 → ACNP
Volume
79
Issue
8
Year of publication
2001
Pages
1193 - 1195
Database
ISI
SICI code
0003-6951(20010820)79:8<1193:BTEEIP>2.0.ZU;2-T
Abstract
We have studied the performance of single-layer polymer light-emitting diod es based on a polyfluorene derivative. Hole-only devices show low currents; however, double-carrier devices show high currents and high efficiencies, implying that the presence of electrons in the device enhances hole injecti on. By numerical modeling, we show that this behavior is consistent with th e presence of a barrier to electron extraction at the anode which causes an increased field for hole injection due to the buildup of electrons at the barrier. (C) 2001 American Institute of Physics.