Preparation, structure and luminescent performance of Na2SiF6:Re3+ (Re3+ = Eu3+, Tb3+, Ce3+) powders

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2019-03, Vol.125 (3), p.1-12, Article 178
• Main Authors: Zhao, Jin-Yu, Wang, Xi-Gui
• Format: Article
• Language: English
• Subjects: Applied physics; Cerium; Characterization and Evaluation of Materials; Condensed Matter Physics; Diodes; Doping; Emission; Europium; Excitation; Fluorescence; Light; Luminescence; Machines; Manufacturing; Materials science; Nanotechnology; Optical and Electronic Materials; Phosphors; Physics; Physics and Astronomy; Processes; Surfaces and Interfaces; Terbium; Thin Films; Ultraviolet radiation; White light
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-019-2468-1

A series of Na 2 SiF 6 : x Re 3+ (Re 3+  = Eu 3+ , Tb 3+ , Ce 3+ ) phosphors were prepared by co-precipitation method. The structure and luminescence performance of the materials were characterized by XRD, TG–DSC, TEM, HRTEM, EDS, FT-IR, fluorescence spectra and the calculated CIE coordinates. The results show that under the excitation of specific UV light, Na 2 SiF 6 : x Eu 3+ , Na 2 SiF 6 : y Tb 3+ and Na 2 SiF 6 : z Ce 3+ single-doping materials exhibit the characteristic emission of Eu 3+ ( 5 D 0  →  7 F 2 , red), Tb 3+ ( 5 D 4  →  7 F 5 , green) and Ce 3+ (5 d  → 4 f , blue), respectively. In the Na 2 SiF 6 : x Eu 3+ – y Tb 3+ – z Ce 3+ three-doping system, Na 2 SiF 6 :0.03Eu 3+ –0.07Tb 3+ –0.07Ce 3+ material is representative. With the increase of exciting wavelength of UV light, the emission color of the material realizes tunable from white light to cool white light, warm white light and red orange light. And the luminescence of the material is closest to the ideal white light under excitation of UV light at 290 nm. So this phosphor can be promised as a single-component tunable white phosphor for application in white LEDs.