POLY(P-PYRIDINE)-BASED AND POLY(P-PYRIDYL-VINYLENE)-BASED POLYMERS - THEIR PHOTOPHYSICS AND APPLICATION TO SCALE DEVICES

Citation
Aj. Epstein et al., POLY(P-PYRIDINE)-BASED AND POLY(P-PYRIDYL-VINYLENE)-BASED POLYMERS - THEIR PHOTOPHYSICS AND APPLICATION TO SCALE DEVICES, Synthetic metals, 78(3), 1996, pp. 253-261
Citations number
38
Categorie Soggetti
Physics, Condensed Matter","Material Science","Polymer Sciences
Journal title
ISSN journal
03796779
Volume
78
Issue
3
Year of publication
1996
Pages
253 - 261
Database
ISI
SICI code
0379-6779(1996)78:3<253:PAPP-T>2.0.ZU;2-Q
Abstract
Photophysics and light-emitting device applications of poly(p-pyridine )- and poly(p-pyridyl vinylene)-based polymers are presented. Extensiv e time-resolved (ps to ms) photoluminescence, stimulated emission and photoinduced absorption studies of solutions, powders and films demons trate that the primary photoexcitation of these polymers is an intrach ain singlet exciton. The presence of (n,pi) states leads to enhanced intersystem crossing to triplet excitons for the powder form, while ag gregate formation plays a key role in the films. Polarons are importan t at longer times. These polymers were used to fabricate 'conventional ' polymer light-emitting diodes. In addition, these polymers were used to demonstrate a novel light-emitting structure, the symmetrically co nfigured a.c. light-emitting (SCALE) device. These new devices have po tential advantages in their use with high workfunction electrodes, suc h as gold, and also in their a.c. operation.