宽带发射黄绿色光的Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉：结构优化、能量转移及热稳定性

Broadband Yellowish-Green Emitting Ba4Gd3Na3(PO4)6F2:Eu(2+) Phosphor: Structure Refinement, Energy Transfer, and Thermal Stability.

作者信息

Fu Xiaopeng, Lü Wei, Jiao Mengmeng, You Hongpeng

机构信息

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Science , Changchun 130022, P. R. China.

College of Chemical Engineering, Northeast Dianli University , Jilin 132012, P. R. China.

出版信息

Inorg Chem. 2016 Jun 20;55(12):6107-13. doi: 10.1021/acs.inorgchem.6b00648. Epub 2016 Jun 1.

DOI:10.1021/acs.inorgchem.6b00648

PMID:27249557

Abstract

A series of Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphors with a broad emitting band have been synthesized by a traditional solid state reaction. The crystal structural and photoluminescence properties of Ba4Gd3Na3(PO4)6F2:Eu(2+) are investigated. The different crystallographic sites of Eu(2+) in Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphors have been verified by means of their photoluminescence (PL) properties and decay times. Energy transfer between Eu(2+) ions, analyzed by excitation, emission, and PL decay behavior, has been indicated to be a dipole-dipole mechanism. Moreover, the luminescence quantum yield as well as the thermal stability of the Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphor have been investigated systematically. The as-prepared Ba4Gd3Na3(PO4)6F2:Eu(2+) phosphor can act as a promising candidate for n-UV convertible white LEDs.

摘要

通过传统固相反应合成了一系列具有宽发射带的Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉。研究了Ba4Gd3Na3(PO4)6F2:Eu(2+)的晶体结构和光致发光性能。通过其光致发光(PL)性能和衰减时间验证了Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉中Eu(2+)的不同晶体学位置。通过激发、发射和PL衰减行为分析表明，Eu(2+)离子之间的能量转移是一种偶极-偶极机制。此外，还系统地研究了Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉的发光量子产率和热稳定性。所制备的Ba4Gd3Na3(PO4)6F2:Eu(2+)荧光粉有望成为近紫外光转换白光发光二极管的候选材料。