Dynamics of the electric field-assisted charge carrier photogeneration in ladder-type poly(para-phenylene) at a low excitation intensity

Electric field-assisted charge carrier photogeneration in a ladder-type methyl-substituted poly(paraphenylene) was investigated by ultrafast absorption spectroscopy at low excitation intensity. The dissociation of excitons into electron-hole pairs occurs from the vibrationally relaxed excited state...

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Published inPhysical review letters Vol. 89; no. 10; p. 107401
Main Authors Gulbinas, Vidmantas, Zaushitsyn, Yuri, Sundström, Villy, Hertel, Dirk, Bässler, Heinz, Yartsev, Arkady
Format Journal Article
LanguageEnglish
Published United States 02.09.2002
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Summary:Electric field-assisted charge carrier photogeneration in a ladder-type methyl-substituted poly(paraphenylene) was investigated by ultrafast absorption spectroscopy at low excitation intensity. The dissociation of excitons into electron-hole pairs occurs from the vibrationally relaxed excited state throughout its lifetime and is caused by the applied electric field, rather than by existence of special "dissociation sites." These findings are of importance for material choice in device applications.
ISSN:0031-9007
DOI:10.1103/physrevlett.89.107401