PICOSECOND TO MILLISECOND PHOTOEXCITATIONS IN POLY(PHENYLENE ACETYLENE)

Authors
LENG JM WEI X VARDENY ZV DING YW BARTON TJ
Citation
Jm. Leng et al., PICOSECOND TO MILLISECOND PHOTOEXCITATIONS IN POLY(PHENYLENE ACETYLENE), Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 256, 1994, pp. 697-703
Citations number
12
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
256
Year of publication
1994
Pages
697 - 703
Database
ISI
SICI code
1058-725X(1994)256:<697:PTMPIP>2.0.ZU;2-N
Abstract
Using ps transient and cw photoinduced absorption and photoluminescenc e, and their respective versions of optically detected magnetic resona nce, we elucidate the origin of photoexcitations in thin films of poly (phenylene acetylene) (PPA). We clearly identified two kinds of photoe xcited singlet excitons: the first type is radiative and unrelaxed whe reas the second type is nonradiative, self trapped and thus long-lived . Other photoexcitations such as triplets and polarons play only a min or role in PPA.