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Emission of Circularly Polarised Light in Highly Oriented Poly( p -Phenylene Vinylene) Langmuir-Blodgett Films

Marletta, A. ; Gonçalves, D. ; Faria, R. M. ; Guimarães, F. E. G.

Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003), 2002-01, Vol.374 (1), p.433-438 [Periódico revisado por pares]

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Título:
Emission of Circularly Polarised Light in Highly Oriented Poly( p -Phenylene Vinylene) Langmuir-Blodgett Films
Autor: Marletta, A. ; Gonçalves, D. ; Faria, R. M. ; Guimarães, F. E. G.
Assuntos: Applied sciences ; Electrical, magnetic and optical properties ; Exact sciences and technology ; Organic polymers ; Physicochemistry of polymers ; Properties and characterization
É parte de: Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003), 2002-01, Vol.374 (1), p.433-438
Descrição: Langmuir-Blodgett (LB) films of poly( p -phenylene vinylene) (PPV) were prepared using an amphiphilic precursor. These LB-PPV films are highly ordered along the dipping direction as demonstrated by linear dichroism experiments using linearly polarized optical absorption. The dichroic ratio between the intensity of the emitted light parallel and perpendicular to the dipping direction is Ca . 3.6. In addition, the LB films displayed circular polarization with a dissymmetry factor, g e , varying from 0.6 to −0.2 after increasing the sample temperature from 36 to 300 K.
Editor: Philadelphia, PA: Taylor & Francis Group
Idioma: Inglês

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