Abstract

Li⁺-doped HoPO₄ powders with a pure tetragonal phase are successfully synthesized by the co-precipitation method. It exhibits an obvious color change under sunlight and tri-phosphor fluorescent light illumination. The introduction of Li⁺ ions into HoPO₄ can further enhance its photochromic property effectively. The doped Li⁺ ions induce changes in the crystal structure. The spectral characteristics and thus photochromic properties of HoPO₄ are explored. The improved HoPO₄ powder, when used as a photochromic material, has wide-ranging prospects in security, decoration, and other applications.

© 2015 Chinese Laser Press

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