无机材料学报2023，Vol.38Issue(3)：357-362,中插1-中插3,9.DOI:10.15541/jim20220504
0.6％Pr,x％La:CaF2的发光性能研究和Judd-Ofelt分析
Luminescence Property and Judd-Ofelt Analysis of 0.6％Pr, x％La:CaF2 Crystals
摘要
Abstract
Calcium fluoride (CaF2) is an attractive laser material due to its broad transmission range (0.125–10 μm), good thermal conductivity (9.71 W/(m·K)) and low coefficient of nonlinear effect. In Pr:CaF2 crystal, the [Pr3+-Pr3+] cluster lead to fluorescence quenching at lower concentrations of Pr3+ ions. Therefore, co-doping of La ions in CaF2 to break the [Pr3+-Pr3+] cluster deserves further exploration. In this work, a series of Pr:CaF2 single crystals co-doped with different concertation of La3+ ions were successfully grown by temperature gradient technique (TGT). The X-ray powder diffraction, absorption spectra, fluorescence spectra and fluorescence decay lifetime of Pr,La:CaF2 crystals were measured. Obtained data demonstrated that the Pr:CaF2 crystals still had the cubic crystal structure after co-doped with La3+ ions. The largest stimulated emission cross-sections of 3P0→3H6 (604 nm) and 3P0→3F2 (640 nm) transitions were calculated to be 1.36×10–20 cm2 and 3.18×10–20 cm2 with FWHM of 17.0 nm and 3.8 nm, respectively. With the increase of La3+ ion concentration, the value of FWHM increased from 15.84 nm to 18.53 nm of 3P0→3H6. The largest fluorescent lifetime and spectral quality factor of 0.6％Pr, 10％La:CaF2 (atom fraction) is 45.82 μs and 1.458×10–18 cm2·μs, respectively. All above results show that the [Pr3+-Pr3+] ions quench clusters are broken by La3+ ions. The Pr, La:CaF2 crystal is a potential laser gain material for orange-red laser operation.关键词
Pr,La:CaF2/光谱性能/Judd–Ofelt理论/荧光寿命Key words
Pr, La:CaF2/spectra property/Judd-Ofelt theory/fluorescence lifetime分类
化学化工引用本文复制引用
钱新宇,曹桂新,徐军,王无敌,宋青松,董永军,薛艳艳,张晨波,王庆国,徐晓东,唐慧丽..0.6％Pr,x％La:CaF2的发光性能研究和Judd-Ofelt分析[J].无机材料学报,2023,38(3):357-362,中插1-中插3,9.基金项目
National Natural Science Foundation of China(61621001,62075166,61805177) （61621001,62075166,61805177）
Fundamental Research Funds for the Central Universities(22120210432) （22120210432）
