Characterization of Al2O3:Eu3+ Luminescent Coatings Prepared by Spray Pyrolysis Technique

Autor:	E. Martínez, M. García, F. Ramos-Brito, O. Alvarez-Fregoso, S. López, S. Granados, J. Chavez-Ramírez, R. Martínez M., C. Falcony
Rok vydání:	2000
Předmět:	Materials science Photoluminescence Atmospheric pressure Doping Analytical chemistry chemistry.chemical_element Condensed Matter Physics Spectral line Electronic Optical and Magnetic Materials Amorphous solid chemistry Activator (phosphor) Europium Luminescence
Zdroj:	physica status solidi (b). 220:677-681
ISSN:	1521-3951 0370-1972
Popis:	Europium doped Al2O3 photoluminescent coatings have been prepared by an ultrasonic spray pyrolysis process, using a solution of 0.05M of AlCl3 · 6H2O as starting material and EuCl3 as doping. These films were deposited on Pyrex glass substrates at atmospheric pressure using purified air as a carrier gas. All films were amorphous in structure. The photoluminescence spectra were measured at room temperature as a function of substrate temperature and doping concentration. For an excitation wavelength of 395 nm, all the photoluminescent spectra show bands located at 587, 600, 612 and 648 nm, characteristics of the trivalent europium ion. We observed a concentration quenching of the photoluminescence at values of activator concentration above 10 at% in the starting solution.
Databáze:	OpenAIRE
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