摘要
采用共沉淀法合成Eu^(3+)掺杂La_3PO_7荧光材料,利用X射线衍射(XRD)、扫描电镜(SEM)、傅里叶红外光谱(FT-IR)和荧光光谱等对合成产物的物相结构和光学性能进行研究,并对合成体系的p H值、Eu^(3+)掺杂量的影响进行分析。结果表明:采用共沉淀法可制备单一相单斜晶系的La_3PO_7:Eu^(3+)晶体。所制备La_3PO_7:Eu^(3+)样品可被280 nm波长紫外光有效激发,在617nm处发射出属于Eu^(3+)的5D0-7F2跃迁的强烈红色光。当Eu^(3+)掺杂量高于4%时(摩尔分数)观察到浓度淬灭现象,其浓度猝灭机理为离子间交换相互作用。
Eu^(3+) doped La_3PO_7 phosphors were synthesized by co-precipitation method. The crystal structure and optical properties of the as-synthesized samples were investigated by XRD, SEM, FT-IR and FL. The influences of p H and doping content of the as-prepared samples were also discussed. The results show that the single-phase La_3PO_7:Eu^(3+)crystals with monoclinic structure can be obtained. The photoluminescence spectra show strong red emission at 617 nm originating from 5D0-7F2 transition of Eu^(3+) ions under 280 nm light excitation. The concentration quenching phenomenon is observed when the doping content is over 4%(mole fraction),and the concentration quenching mechanism is caused by the exchange interaction of Eu^(3+) ions.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2017年第5期974-980,共7页
The Chinese Journal of Nonferrous Metals
基金
贵州师范大学研究生创新基金资助项目(研创2015(31))
国家自然科学基金资助项目(213610007)
贵州自然科学基金资助项目(黔科合J字[2012]2269号)
贵州省高层次人才科研特助经费项目(TZJY-2011-40)
贵州省国际科技合作计划项目(黔科合外G字[2013]7015号)~~