Nonstoichiometric LaO_0.65F_1.7 Structure and Its Green Luminescence Property Doped with Bi³⁺ and Tb³⁺ Ions for Applying White UV LEDs.

ABSTRACT: Red-green-blue phosphors excited by ultraviolet (UV) radiation for white light LEDs have received much attention to improve the efficiency, color rendering index (CRI), and chromatic stability. The spectral conversion of a rare-earth ion-doped nonstoichiometric LaO_0.65F_1.7 host was explored with structural analysis in this report. The nonstoichiometric structure of a LaO_0.65F_1.7 compound, synthesized by a solid-state reaction using La₂O₃ and excess NH₄F precursors, was analyzed by synchrotron X-ray powder diffraction. The crystallized LaO_0.65F_1.7 host, which had a tetragonal space group of P4/nmm, contained 9- and 10-coordinated La³⁺ sites. Optical materials composed of La

SUBMITTER: Yang S 

PROVIDER: S-EPMC9229386 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature