Bloisi, Francesco and Rosario Maria Vicari, Luciano and Barra, Mario and Cassinese, Antonio and Fanelli, Esther and 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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Tipologia del documento: Pubblicazione in rivista scientifica
Lingua: English
Titolo: Substrate temperature dependence of the structure of polythiophene thin films obtained by Matrix Assisted Pulsed Laser Evaporation (MAPLE).
Bloisi, Francesco[non definito]
Rosario Maria Vicari, Luciano[non definito]
Barra, Mario[non definito]
Cassinese, Antonio[non definito]
Fanelli, Esther[non definito]
Carella, Antonio[non definito]
Roviello, Antonio[non definito]
Autore/i: Califano V., Bloisi F., Vicari L., Barra M., Cassinese A., Fanelli E., Buzio R., Valbusa U., Carella A., Roviello A.
Data: 2009
Numero di pagine: 8
Dipartimento: Scienze fisiche
Numero identificativo: 10.1051/epjap/2009130
Data: 2009
Volume: 48
Numero: 1
Intervallo di pagine: 10505/1-10505/8
Numero di pagine: 8
Parole chiave: Optical properties, Organic compounds, UV/Vis IR radiation effects
Numero identificativo: 10.1051/epjap/2009130
Depositato il: 21 Ott 2010 06:56
Ultima modifica: 30 Apr 2014 19:43


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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