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Chiral Polyalkylthiophenes for Organic Light Emitting Diodes

Published online by Cambridge University Press:  15 March 2011

F. Lebon ,
G. Longhi ,
S. Abbate ,
M. Catellani ,
S. Luzzati  and
A. Bolognesi
F. Lebon
Affiliation:
Dip. Scienze Biomediche e Biotecnologie, Univ. di Brescia, Brescia, Italy Ist. Nazionale di Fisica della Materia (INFM), Brescia, Italy
G. Longhi
Affiliation:
Dip. Scienze Biomediche e Biotecnologie, Univ. di Brescia, Brescia, Italy Ist. Nazionale di Fisica della Materia (INFM), Brescia, Italy
S. Abbate
Affiliation:
Dip. Scienze Biomediche e Biotecnologie, Univ. di Brescia, Brescia, Italy Ist. Nazionale di Fisica della Materia (INFM), Brescia, Italy
M. Catellani
Affiliation:
Ist. Chimica delle Macromolecole- CNR, Milano, Italy
S. Luzzati
Affiliation:
Ist. Chimica delle Macromolecole- CNR, Milano, Italy
A. Bolognesi
Affiliation:
Ist. Chimica delle Macromolecole- CNR, Milano, Italy
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Abstract

Chiral polyalkylthiophenes are noncentrosymmetric organic materials which can be used both in second harmonic-generation devices and in polarized light emitting diodes. In this work we present the synthesis and the characterization of a polyalkylthiophene with a chiral center very close to the conjugated backbone: poly(3-[(S)-2-methylbutyl]thiophene) (PMBT). Circular dichroism (CD) measurements have been carried out to ascertain the chirality of these materials. The CD spectra show intense signals both in mixed solvents and in the solid state. The strong Cotton effect can be associated to a highly ordered aggregated phase whose nature is still under investigation. We also present the photo and electroluminescence characterization of single layer light emitting diode (LED) with the following configuration: ITO (Tin Indium Oxide)/PMBT/Al.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 708: Symposium BB – Organic Optoelectronic Materials, Processing and Devices , 2001 , BB10.28
Copyright
Copyright © Materials Research Society 2002

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References

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