Bloisi, Francesco, Rosario Maria Vicari, Luciano, Barra, Mario, Cassinese, Antonio, Fanelli, Esther, Carella, Antonio and Roviello, Antonio (2009) Substrate temperature dependence of the structure of polythiophene thin films obtained by Matrix Assisted Pulsed Laser Evaporation (MAPLE). [Pubblicazione in rivista scientifica]

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Item Type: Pubblicazione in rivista scientifica
Resource language: English
Title: Substrate temperature dependence of the structure of polythiophene thin films obtained by Matrix Assisted Pulsed Laser Evaporation (MAPLE).
Creators:
Creators
Email
Bloisi, Francesco
UNSPECIFIED
Rosario Maria Vicari, Luciano
UNSPECIFIED
Barra, Mario
UNSPECIFIED
Cassinese, Antonio
UNSPECIFIED
Fanelli, Esther
UNSPECIFIED
Carella, Antonio
UNSPECIFIED
Roviello, Antonio
UNSPECIFIED
Autore/i: Califano V., Bloisi F., Vicari L., Barra M., Cassinese A., Fanelli E., Buzio R., Valbusa U., Carella A., Roviello A.
Date: 2009
Number of Pages: 8
Department: Scienze fisiche
Identification Number: 10.1051/epjap/2009130
Journal or Publication Title: THE EUROPEAN PHYSICAL JOURNAL. APPLIED PHYSICS
Date: 2009
Volume: 48
Number: 1
Page Range: 10505/1-10505/8
Number of Pages: 8
Keywords: Optical properties, Organic compounds, UV/Vis IR radiation effects
Identification Number: 10.1051/epjap/2009130
Date Deposited: 21 Oct 2010 06:56
Last Modified: 30 Apr 2014 19:43
URI: http://www.fedoa.unina.it/id/eprint/7337

Collection description

Thin films of head-tail (H-T) regio-regular poly[3-(4-octyloxyphenyl) thiophene] (POOPT) were grown using the MAPLE (Matrix Assisted Pulsed Laser Evapn.) technique in which the target is a frozen soln. of the polymer in chloroform. Target evapn. was obtained by laser irradn. at 1064 nm and substrates were kept at different temps. Information concerning the preservation of the polymer local chem. structure following laser irradn. was obtained by FTIR (Fourier Transform IR) spectroscopy. Based on FTIR data, the chem. structure of the deposited polymer seemed to undergo little or no damage. From UV-Visible spectroscopic anal., it turned out that the degree of order of the film is strongly affected by the substrate temp.: the polymer was deposited in a disordered form on the substrate at room temp. whereas on the hot surface we locally obtained the .pi.-stacked structure characteristic of polythiophenes. Atomic force microscopy (AFM) images showed that the polymer formed aggregates of different dimensions (<1 .mu.m to 5 .mu.m) with a columnar shape and showed micrometric domains with sharp and apparently regular edges for the film grown on a hot substrate. Elec. measurements performed by a std. two-probe technique confirm that the structural order degree strongly affects the film charge transport properties.

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