Eu²⁺ Doping Concentration-Induced Site-Selective Occupation and Photoluminescence Tuning in KSrScSi₂O₇:Eu²⁺ Phosphor.

ABSTRACT: Regulation of Eu²⁺ dopants in different cation sites of solid-state materials is of great significance for designing multicolor phosphors for light-emitting diodes (LEDs). Herein, we report the selective occupation of Eu²⁺ for multiple cationic sites in KSrScSi₂O₇, and the tunable photoluminescence from blue to cyan is realized through Eu²⁺ doping concentration-dependent crystal-site engineering. Eu²⁺ preferably occupies the K and Sr sites in KSrScSi₂O₇ at a low doping concentration, resulting in a 440 nm blue emission. As the Eu²⁺ concentration increases, a new Eu²⁺ substitution pathway is triggered, that is, Eu²⁺ enters the Sc site, leading to the red-shifted emission

SUBMITTER: Lai S 

PROVIDER: S-EPMC9928192 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature