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 in | Physical review letters Vol. 89; no. 10; p. 107401 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
02.09.2002
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Online Access | Get more information |
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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. |
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ISSN: | 0031-9007 |
DOI: | 10.1103/physrevlett.89.107401 |