LONG-LIVED DEFECTS IN POLYCARBAZOLYLDIACETYLENES. PHOTOINDUCED VIS AND INFRARED SPECTRA

Dellepiane, G.; Cuniberti, C.; Comoretto, D.; Musso, G.F.; Piaggio, P.; Speroni, F.; Botta, C.; Luzzati, S.

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Photoinduced absorption spectra of different polycarbazolyldiacetylenes in the visible and infrared regions are reported. Long-lived bipolaronic defects, photogenerated by excitation above the band-gap (2.54 eV), are found responsible for the observed signals. Associated with these defects, photogenerated infrared active vibrations (IRAV) are observed as absorption bands or apparent bleachings arising from Fano-type interference. This different behaviour originates from the different degree of overlap of the IRAV modes with the associated low-energy bipolaronic absorption.

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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11567/303410

Titolo:	LONG-LIVED DEFECTS IN POLYCARBAZOLYLDIACETYLENES. PHOTOINDUCED VIS AND INFRARED SPECTRA
Autori interni:	DELLEPIANE, GIOVANNA CUNIBERTI, CARLA EMILIA COMORETTO, DAVIDE MUSSO, GIANFRANCO PIAGGIO, PAOLO
Data di pubblicazione:	1994
Rivista:	MATERIALS RESEARCH SOCIETY SYMPOSIA PROCEEDINGS
Abstract:	Photoinduced absorption spectra of different polycarbazolyldiacetylenes in the visible and infrared regions are reported. Long-lived bipolaronic defects, photogenerated by excitation above the band-gap (2.54 eV), are found responsible for the observed signals. Associated with these defects, photogenerated infrared active vibrations (IRAV) are observed as absorption bands or apparent bleachings arising from Fano-type interference. This different behaviour originates from the different degree of overlap of the IRAV modes with the associated low-energy bipolaronic absorption.
Handle:	http://hdl.handle.net/11567/303410
Appare nelle tipologie:	01.01 - Articolo su rivista

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