Optical studies of electric fields in poly(2-methoxy-5-ethyl(2(')-hexyloxy) para-phenylene vinylene) light-emitting diodes

Citation
C. Giebeler et al., Optical studies of electric fields in poly(2-methoxy-5-ethyl(2(')-hexyloxy) para-phenylene vinylene) light-emitting diodes, APPL PHYS L, 74(24), 1999, pp. 3714-3716
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
0003-6951 → ACNP
Volume
74
Issue
24
Year of publication
1999
Pages
3714 - 3716
Database
ISI
SICI code
0003-6951(19990614)74:24<3714:OSOEFI>2.0.ZU;2-I
Abstract
We report electroabsorption studies of poly(2-methoxy-5-ethyl(2(')-hexyloxy ) para-phenylene vinylene) light-emitting diodes. An electric field develop s during operation which opposes the field of the applied bias. The counter field builds up within 5 s of turning on the device, increases in magnitud e with the operating voltage, and decays exponentially with a time constant between 15 and 32 s. We attribute the counter field to bulk carrier traps and discuss its relevance to the increase of the turn-on voltage as organic light-emitting diodes degrade. (c) 1999 American Institute of Physics. [S0 003-6951(99)01224-3].