Abstract

Glass ceramics Ba₂LaF₇:xDy³⁺ are obtained through the conventional melt-quenching technique, and their luminescent properties are investigated. Under 350 nm excitation, the emission spectra consists of a strong blue-yellow band as well as a weak red emission centered at 660 nm, which are attributed to the F_9/24→H_15/26, F_9/24→H_13/26 and F_9/24→H_11/26 transitions of the Dy³⁺ ion, respectively. The corresponding Commission Internationale de L’Eclairage (CIE) chromaticity coordinate for a sample of 2 mol.% Dy₂O₃ after being heat-treated at 690°C is (0.313, 0.328). It is concluded that the formed materials may have the possibility of applications for white light-emitting diodes (LEDs).

© 2015 Chinese Laser Press

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