TRANSIENT UV ELECTROLUMINESCENCE FROM POLY(P-PHENYLENEVINYLENE) CONJUGATED POLYMER-INDUCED BY STRONG VOLTAGE PULSES

Authors
CHAYET H POGREB R DAVIDOV D
Citation
H. Chayet et al., TRANSIENT UV ELECTROLUMINESCENCE FROM POLY(P-PHENYLENEVINYLENE) CONJUGATED POLYMER-INDUCED BY STRONG VOLTAGE PULSES, Physical review. B, Condensed matter, 56(20), 1997, pp. 12702-12705
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
20
Year of publication
1997
Pages
12702 - 12705
Database
ISI
SICI code
0163-1829(1997)56:20<12702:TUEFPC>2.0.ZU;2-T
Abstract
We present time-resolved and spectral measurements of electroluminesce nce from poly(p-phenylenevinylene) (PPV) thin films upon application o f high-voltage pulses. Above some threshold voltage of 100 V, we obser ve an uv-violet emission centered at 390 nm, in addition to the charac teristic yellow-green luminescence of PPV. We explain this emission as being induced by a generation of hot carriers in the strong electric field, which inhibits the formation of singlet excitons and enhances t he probability for direct interband transitions of the relaxed carrier s.