Fluorescence regulation derived from Eu3+ in miscible-order fluoride-phosphate blocky phosphor. (4th August 2021)

• Record Type: Journal Article
• Authors: Xiong, Jianyang; Li, Gang; Zhang, Jing; Li, Desheng; Pun, Edwin Yue Bun; Lin, Hai
• Is Part Of: Nanotechnology. Volume 32:Number 43(2021)
• Publication Date: 2021-08-04
• Subjects: fluoride-phosphate blocky phosphor -- multi-peak emissions -- white-light-emitting; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac15c7
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Miscible-order fluoride-phosphate blocky phosphor (FBP), composed with ordered-phase of NaYF4 crystals and unordered phase of tin-fluorophosphate glass, is prepared by a two-step process and luminescent properties of FBPs embedded with different particle sizes of NaYF4 crystals are presented. High-frequency fluorescence from higher metastable 5 D J ( J = 1, 2 and 3) energy levels are effectively released in Eu 3+ doped fluoride crystals. Taking the blue emission of Sn 2+ as the framework, multi-peak emissions from metastable energy levels are controlled to adjust the color coordinates of the FBP to the white-light region, which the color rendering index (CRI) reaches 89. Tunable color FBP with high CRI retains splendid luminescence property of fluoride, providing a potential candidate for the development of white LED.