Abstract
Phosphors of the (CaO-Al2O3-SiO2):Eu system obtained by direct solid-state synthesis in air at 1300°C produce broadband photoluminescence (PL) covering the entire visible range under excitation by a nitrogen laser. Upon vacuum annealing, the PL intensity in (CaO-Al2O3-SiO2):Eu and (CaO-Al2O3-2SiO2):Eu samples exhibits a several-fold increase and the latter phosphor yields blue emission according to the CIE color standard. The annealing of a (CaO-Al2O3):Eu composition leads to a change in the emission color from red (close to that according to the EBU scale) to blue (in the same scale). Vacuum-annealed (CaO-2Al2O3):Eu phosphor yields red emission (close to that according to the NTSC scale), while (2CaO-Al2O3):Eu composition exhibits intense purple luminescence.
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Original Russian Text © N.T. Gurin, K.V. Paksyutov, M.A. Terent’ev, A.V. Shirokov, 2009, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2009, Vol. 35, No. 15, pp. 41–49.
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Gurin, N.T., Paksyutov, K.V., Terent’ev, M.A. et al. Broadband photoluminescence in the (CaO-Al2O3-SiO2):Eu system. Tech. Phys. Lett. 35, 705–709 (2009). https://doi.org/10.1134/S1063785009080069
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DOI: https://doi.org/10.1134/S1063785009080069