High-quality a-oligothiophene films grown by supersonic seeded beams: optical, morphological, and structural characterization

Salvatore Iannotta; Tullio Toccoli; Maurizio Ferrari; Stefania Ronchin; Alessandro Podesta; Paolo Milani; Paolo Scardi

doi:10.1117/12.386368

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19 May 2000 High-quality α-oligothiophene films grown by supersonic seeded beams: optical, morphological, and structural characterization

Salvatore Iannotta, Tullio Toccoli, Maurizio Ferrari, Stefania Ronchin, Alessandro Podesta, Paolo Milani, Paolo Scardi

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Proceedings Volume 3939, Organic Photonic Materials and Devices II; (2000) https://doi.org/10.1117/12.386368
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

A novel approach to the deposition of high quality films of oligothiophenes has been developed. It is based on an original seeded supersonic molecular beam combined with an ultra high vacuum deposition chamber. This method gives an unprecedented control on film properties. Several quaterthiophene films under different beam conditions have been prepared and characterized by optical absorption, photoluminescence, tapping mode atomic force microscopy, secondary electron microscopy and x-ray diffraction. Morphology, structure and optical response are controlled by the beams' parameters. Highly ordered films, up to several hundreds of nm thick, show well resolved vibronic structures in low temperatures fluorescence spectra as only the best published data on films a few monolayers thick do.

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Salvatore Iannotta, Tullio Toccoli, Maurizio Ferrari, Stefania Ronchin, Alessandro Podesta, Paolo Milani, and Paolo Scardi "High-quality α-oligothiophene films grown by supersonic seeded beams: optical, morphological, and structural characterization", Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); https://doi.org/10.1117/12.386368

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