材料科学与工程学报2018，Vol.36Issue(3)：460-464,5.DOI:10.14136/j.cnki.issn1673-2812.2018.03.021
稀土掺杂双钙钛矿结构红色荧光粉的制备及其发光性能
Preparation and Luminescence of Rare-earth Doped Double Perovskite Red Phosphors
摘要
Abstract
Double perovskite red phosphors Sr2 － xBaxMgMoO6∶Eu3+(x＝0,0.5,1,1.5,2) were synthesized by the high temperature solid-state reaction method . In present work , effects of calcination condition and Ba substitution content on the phase structure and luminescence properties of Sr2 － xBaxMgMoO6∶Eu3+(x＝0,0.5,1,1.5,2) phosphors were studied .The optimum calcination process of Sr2Mg0.94Eu0.06MoO6 phosphors was :700℃ for 1 hour ,1050℃ for 1 hour and then 1300℃ for 4 hours ,and the obtained sample had a tetragonal double perovskite main phase with a small amount of SrMoO 4and Sr3MoO6. The phosphors showed a strong wide charge transfer band between 300 nm to 450 nm ,and a high red emission of Eu3+under 399 nm excitation ,which was correspondent to the 5D0→ 7F2electrical dipole transition of Eu3+.With the increase of Ba substitution content for Sr ,the luminescent emission of the samples was significantly improved while the crystal structure changed from tetragonal system to cubic one .Because the 5D0→ 7F2electrical dipole transition of Eu3+was depressed due to the improvement of crystal symmetry ,the luminescent emission was dominated from electrical dipole transition to magnetic one .关键词
白光LED/红色荧光粉/钼酸盐/双钙钛矿结构Key words
white LED/red phosphors/molybdate/double perovskite分类
通用工业技术引用本文复制引用
章钒,陈颜龙,李涓..稀土掺杂双钙钛矿结构红色荧光粉的制备及其发光性能[J].材料科学与工程学报,2018,36(3):460-464,5.基金项目
国家重点研发计划资助项目(2017YFB0404301) ,硅材料国家重点实验室开放基金资助项目(SKL2015-08) （2017YFB0404301）
