Effect of Al3+ Additions on the Microstructure and Photoluminescence of SrTiO3:Pr3+ Phosphors Produced by the Sol–Gel Method

• Published in: Theoretical and experimental chemistry Vol. 49; no. 3; pp. 158 - 164
• Main Authors: Marchylo, O. M., Nakanishi, Y., Kominami, H., Hara, K., Zavyalova, L. V., Svechnikov, S. V., Snopok, B. A.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-07-2013
• Subjects: Chemistry; Chemistry and Materials Science; Chemistry/Food Science; phosphor; iron; Pr; photoluminescence; aluminum; SrTiO
• ISSN: 0040-5760; 1573-935X
• DOI: 10.1007/s11237-013-9309-7

The effect of various concentrations of Pr
3+
on the structural and luminescent characteristics of SrTiO
3
:Pr
3+
phosphors synthesized by the sol–gel method was investigated. Maximum intensity of red luminescence (617 nm) for SrTiO
3
:Pr
3+
with excitation by ultraviolet radiation is observed at an effective Pr
3+
concentration of 0.2 mole %. It was shown that the addition of aluminum at the optimum Pr
3+
concentration leads to deterioration of the crystallinity and reduces brightness of the SrTiO
3
:Pr
3+
luminescence. The reason for the last effect may be the presence of minute amounts of iron impurity in the initial reagents.