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Photoinduced Absorption Spectroscopy of Poly-3-Alkylthiophenes

Published online by Cambridge University Press:  25 February 2011

C. Botta ,
S. Luzzati ,
A. Bolognesi ,
R. Tubino  and
A. Borghesi
C. Botta
Affiliation:
Istituto di Chimica delle Macromolecole, CNR, Milano (Italy)
S. Luzzati
Affiliation:
Istituto di Chimica delle Macromolecole, CNR, Milano (Italy)
A. Bolognesi
Affiliation:
Istituto di Chimica delle Macromolecole, CNR, Milano (Italy)
R. Tubino
Affiliation:
Istituto di Chimica delle Macromolecole, CNR, Milano (Italy) Istituto di Matematica e Fisica, Università di Sassari, Sassari (Italy)
A. Borghesi
Affiliation:
Dipartimento di Fisica, Università di Pavia, Pavia (Italy)
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Abstract

We report a study of the near infrared photoinduced absorption of a series of poly -3-decylthiophene with different supermolecular organization as solution cast films, good solvent and aggregated bad solvent solutions.

Photoinduced subgap electronic states are detected both in the solid and in solutions independently from the presence of polymer aggregates. The study of the photoinduced activity Δ/T on the laser intensity I indicate a I0.6 dependence for the films and a I0.95 dependence for the solutions. This is the evidence that the photoinduced states are generated in the solid via an inter-chain mechanism while in the solution via an intra-chain mechanism.

A possible role of the solvent into the photoexcitation pathway is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 247: Symposium N – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1992 , 669
Copyright
Copyright © Materials Research Society 1992

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References

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