Deep Red Photoluminescence from Cr³⁺ in Fluorine-Doped Lithium Aluminate Host Material.

ABSTRACT: Deep red phosphors have attracted much attention for their applications in lighting, medical diagnosis, health monitoring, agriculture, etc. A new phosphor host material based on fluorine-doped lithium aluminate (ALFO) was proposed and deep red emission from Cr³⁺ in this host material was demonstrated. Cr³⁺ in ALFO was excited by blue (~410 nm) and green (~570 nm) rays and covered the deep red to near-infrared region from 650 nm to 900 nm with peaks around 700 nm. ALFO was a fluorine-doped form of the spinel-type compound LiAl₅O₈ with slightly Li-richer compositions. The composition depended on the preparation conditions, and the contents of Li and F tended to decrease with preparation temperature, such as Al_4.69Li_1.31F

SUBMITTER: Kamada Y 

PROVIDER: S-EPMC10817566 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature