Affiliation:
1. Yunnan Joint International Laboratory of Optoelectronic Materials and Devices Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming Yunnan 650093 China
2. Faculty of Land Resources Engineering of Kunming University of Science and Technology Kunming Yunnan 650500 China
Abstract
AbstractOptical materials have attracted much attention in anti‐counterfeiting applications due to their visualization and multi‐emission modes. However, the unit occupancy predestines the material to only monochromatic emission, inhibiting the application of optical materials in advanced information encryption. Here, a green to yellow to deep‐red phosphor is reported in a Mn2+‐activated garnet compound Ca2YMgScSi3O12: Mn2+ (CYMSS: Mn2+), originating from the abundant lattice sites occupying within the crystal structure by Mn2+ ions. Three different photoluminescence (PL) emission bands peaked at 517, 576, and 720 nm from 4T1 (G) → 6A1 (S) are observed, which are attributed to the substitution of [Sc/MgO6] octahedron and [Ca/YO8] dodecahedron sites by Mn2+ ions, respectively. Hence, tunable emissions from green to deep‐red are realized in single Mn2+ doping by switching the excitation source of ultraviolet (UV)/blue and X‐ray, which can be further regulated by varying the Mn2+ concentration. Multi‐position occupying, color‐tunable light‐emitting materials offer the possibility of more advanced optical information encryption.
Funder
Natural Science Foundation of Gansu Province
Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials