Time resolved ESR measurements of photoinduced polarons in PPV

Authors
Murata, K Shimoi, Y Abe, S Noguchi, T Ohnishi, T
Citation
K. Murata et al., Time resolved ESR measurements of photoinduced polarons in PPV, SYNTH METAL, 101(1-3), 1999, pp. 353-354
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
101
Issue
1-3
Year of publication
1999
Pages
353 - 354
Database
ISI
SICI code
0379-6779(199905)101:1-3<353:TREMOP>2.0.ZU;2-E
Abstract
To study the early stage of photoexcitation in poly(paraphenylene vinylene) (PPV), we have performed a time-resolved measurements of light-induced ESR (LESR). Transient photo-induced spins with two decay components are clearl y observed. Its time constant of the order of a few micro-second for the fa ster component is comparable with previous transient-photocurrent data of a PPV derivative. The observed spectral shape accords with the previous resu lts of cw-LESR, indicating that the observed signal is due to photoinduced polarons.