摘要
利用简单的水热法制备了立方相KY_3F10:15%Yb^(3+),0.5%Tm^(3+),0.2%Ho^(3+)上转换纳米晶。在980 nm激发下,获得接近等能白的上转换发光。上转换机理分析表明,蓝、绿、红光发射分别源自Yb^(3+)到Tm^(3+)和Ho^(3+)的能量传递。更重要的是,该上转换白光显示了良好的色稳定性。当泵浦功率由688 m W增加到1 688m W,色差仅为0.027 5。其原因在于,一方面三基色发光的功率关系比较接近;另一方面蓝光的功率关系随泵浦功率的增加逐渐减小,而绿、红光的功率关系保持不变。蓝光的饱和现象可能与激光辐射所引起的热效应有关。
Cubic KY 3F 10∶15%Yb^3+,0.5%Tm^3+,0.2%Ho^3+upconversion nanocrystals were synthesized by a simple hydrothermal method.Under the excitation of 980 nm,the upconversion luminescence with chromaticity coordinates nearby equal energy white was obtained.The analysis of the upconversion mechanism shows that the blue,green,and red emissions originate from the energy transfer from Yb^3+to Tm^3+and Ho^3+,respectively.More importantly,it is found that the upconversion white emission shows favorable color stability.When the pump power increases from 688 mW to 1 688 mW,the aberration is only 0.027 5.The reason is that,on the one hand,the power dependences of the three primary colors are relatively close to each other.On the other hand,the power dependence of the blue emission gradually decreases as the pump power increases,while the power dependences of the green and red emissions remain unchanged.The saturation of blue emission may be related to the thermal effect caused by laser radiation.
作者
庞涛
王玉
谢建平
PANG Tao;WANG Yu;XIE Jian-ping(College of Science,Huzhou University,Huzhou 313000,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2018年第9期1233-1238,共6页
Chinese Journal of Luminescence
基金
国家自然科学基金(11747312)
浙江省自然科学基金(LY15A040003)
湖州师范学院校级科研项目(2016XJXM23)资助~~
关键词
上转换白光
色稳定性
KY3F10
纳米晶
upconversion white emission
color stability
KY 3F 10
nanocrystals
作者简介
庞涛(1981-),男,辽宁鞍山人,博士,讲师,2010年于大连海事大学获得博士学位,主要从事稀土发光与器件方面的研究。E-mail:tpang@126.com
