Luminescence properties and thermal stability of a red phosphor ZnSiF6·6H2O:Mn4+ synthesized by the one-step hydrothermal method

• Published in: Journal of luminescence 2014-08, Vol.152, p.214-217
• Main Authors: Lv, Lifen, Jiang, Xianyu, Pan, Yuexiao, Liu, Guokui, Huang, Shaoming
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Luminescence; Optical materials; Optical properties; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2013.10.052

A red phosphor composed of Mn4+ embedded in host lattice of ZnSiF6·6H2O has been prepared by a one-step hydrothermal method. The host lattice ZnSiF6·6H2O is obtained from ZnF, SiO2 and HF. The luminescence center of Mn4+ is formed by incomplete reduction of KMnO4 with HF. The composition and crystal structure have been determined with measurements of XRD, EDS and infrared spectra. The thermal stability has been investigated by TG–DSC. The H2O molecules in the compound are not combined crystal water but structural water that coordinate Zn2+. The luminescence properties of phosphor ZnSiF6·6H2O:Mn4+ at 78K and 298K have been investigated. Luminescence quenches at a temperature higher than 200°C mainly which is due to the decomposition of crystal structure. •Phosphor ZnSiF6·6H2O:Mn4+ has been synthesized by the one-step hydrothermal method.•H2O in the ZnSiF6·6H2O structure is structural water.•Thermal quenching for ZnSiF6·6H2O:Mn4+ is due to decomposition of host lattice.