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Long-Lived Defects In Polycarbazolyld1 Acetylenes. Photoinduced Vis And Infrared Spectra

Published online by Cambridge University Press:  16 February 2011

G. Dellepiane ,
C. Cuniberti ,
D. Comoretto ,
G. F. Musso ,
P. Piaggio ,
F. Speroni ,
C. Botta  and
S. Luzzati
G. Dellepiane
Affiliation:
Istituto di Chimica Industriale, Università di Genova, Corso Europa 30,1–16132 Genova, Italy
C. Cuniberti
Affiliation:
Istituto di Chimica Industriale, Università di Genova, Corso Europa 30,1–16132 Genova, Italy
D. Comoretto
Affiliation:
Istituto di Chimica Industriale, Università di Genova, Corso Europa 30,1–16132 Genova, Italy
G. F. Musso
Affiliation:
Istituto di Chimica Industriale, Università di Genova, Corso Europa 30,1–16132 Genova, Italy
P. Piaggio
Affiliation:
Istituto di Chimica Industriale, Università di Genova, Corso Europa 30,1–16132 Genova, Italy
F. Speroni
Affiliation:
Istituto di Chimica delle macromolecole del C.N.R., Via Bassini 15,1–20133 Milano, Italy
C. Botta
Affiliation:
Istituto di Chimica delle macromolecole del C.N.R., Via Bassini 15,1–20133 Milano, Italy
S. Luzzati
Affiliation:
Istituto di Chimica delle macromolecole del C.N.R., Via Bassini 15,1–20133 Milano, Italy
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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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 328: Symposium Q – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1993 , 739
Copyright
Copyright © Materials Research Society 1994

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References

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