Strong photoluminescence and cathodoluminescence due to f–f transitions in Eu[sup 3+] doped Al[sub 2]O[sub 3] powders prepared by direct combustion synthesis and thin films deposited by laser ablation

Rakov, Nikifor; Ramos, Francisco E.; Hirata, Gustavo; Xiao, Mufei
July 2003
Applied Physics Letters;7/14/2003, Vol. 83 Issue 2, p272
Academic Journal
In this letter, we report on fabrication and luminescent properties of phosphor powders and thin films of Eu31doped alumina Al[SUB2]O[SUB3]. The powders were fabricated by combustion synthesis process at a low temperature, 280 °C and showed strong photoluminescent and cathodoluminescent emissions. Powders of Eu[SUP3+] doped Al[SUB2]O[SUB3] of concentration 1.0 mol % were deposited on quartz-glass substrates to form thin films by means of laser ablation. Under ultraviolet excitation and electron beam excitation, these samples containing microcrystalline structures showed strong luminescence due to f - f transitions, and the dominant transition was the hypersensitive 5D[SUB0] → [SUP7]F[SUB2] red emissionof Eu[SUP3+].


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