Chiral Polyalkylthiophenes for Organic Light Emitting Diodes

Authors :: Giovanna Longhi
Alberto Bolognesi
M. Catellani
Silvia Luzzati
F. Lebon
S. Abbate
Source :: Scopus-Elsevier, ORGANIC OPTOELECTRONIC MATERIALS, PROCESSING AND DEVICES, edited by Moss, SC, pp. 341–347, 2002, info:cnr-pdr/source/autori:Lebon, F; Longhi, G; Abbate, S; Catellani, M; Luzzati, S; Bolognesi, A/titolo:Chiral polyalkylthiophenes for organic light emitting diodes/titolo_volume:ORGANIC OPTOELECTRONIC MATERIALS, PROCESSING AND DEVICES/curatori_volume:Moss, SC/editore:/anno:2002
Publication Year :: 2001
Publisher :: Springer Science and Business Media LLC, 2001.
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.