Thin films of alumina doped with cerium deposited by spray-pyrolysis can be used as photoluminescent emitters in the range of the violet-blue (360 - 410 nm). All of the spectra of these films presented asymmetrical features those are resultants of the overlap of two peaks centered in 365 and 395 nm. The aged films presented smaller luminescence than that observed in the as-deposited samples. Besides, it was observed in the spectra of the aged samples a deviation of the emission band for smaller wavelengths. The thermal treatment at 300 ºC for eight hours reduced the luminescence intensity of the as-deposited samples and of the aged samples. The treated films presented a ratio of peak areas centered in 365 and 395 nm smaller than observed in the non-treated films taking to the displacement of the emission band for larger wavelengths.
cerium; luminescence; spray-pyrolysis
