Abstract

A technique for the synthesis of NaBaPO₄:Eu²⁺ phosphors with increased dispersity via sol-gel precipitation and subsequent high-temperature annealing in molten NaCl is developed. The synthesized NaBaPO₄:Eu²⁺ phosphor has a nanocrystalline structure and its annealing in molten NaCl is shown to reduce the average particle size by a factor of 3.8 while increasing the content of the finely dispersed (i.e., particle sizes <1  μm) fraction of the phosphor by a factor of 11 by comparison with the phosphor synthesized by the traditional sol-gel method. We establish that the synthesized NaBaPO₄:Eu²⁺ phosphors contain four types of luminescence centers and construct their resulting energy diagram.

© 2017 Optical Society of America

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