We investigated the optical and the electrical conductivity properties of synthetic melanin thin films spray-coated on glass. These films showed a broadband monotonic increase of the absorption coefficient, decreasing the wavelength in the Visible-NIR range. Conductivity as a function of the temperature evidenced a semiconductor like character and a hysteretic behaviour after thermal annealing up to 475 K. Thermal activation energies extrapolated by resistance curves have been explained by using the framework of a band-model as for an amorphous semiconductor.

Optical and electrical behavior of synthetic melanin thin films spray-coated

PINTO, Nicola;MURRI, Roberto Vittorio;CUCCIOLONI, Massimiliano;ANGELETTI, Mauro;TOMBESI, Paolo
2010-01-01

Abstract

We investigated the optical and the electrical conductivity properties of synthetic melanin thin films spray-coated on glass. These films showed a broadband monotonic increase of the absorption coefficient, decreasing the wavelength in the Visible-NIR range. Conductivity as a function of the temperature evidenced a semiconductor like character and a hysteretic behaviour after thermal annealing up to 475 K. Thermal activation energies extrapolated by resistance curves have been explained by using the framework of a band-model as for an amorphous semiconductor.
2010
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/203130
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