摘要
采用超声辅助共沉淀法合成了以Eu^(3+)为激活离子的Ca Mo O_4荧光粉。通过X-射线衍射、扫描电镜(SEM)、荧光分光光度计对样品进行了表征和分析,研究了溶剂浓度、表面活性剂种类、表面活性剂添加量、超声时间等反应参数对Ca Mo O_4∶Eu^(3+)发光性能的影响。结果表明:制备的样品为球形纯相四方晶系Ca Mo O_4晶体,在Ca Mo O_4∶Eu^(3+)中存在Mo O_4^(2-)到Eu^(3+)的能量传递。以50%丙酮溶液作为溶剂、PEG添加量为9 m L、Eu^(3+)掺杂浓度为10%、超声时间为10 min时,制备的样品在393 nm光激发下,Ca Mo O_4∶Eu^(3+)的最强峰所在位置是616 nm,实现了有效的红光发射,样品在紫外灯下呈现出明亮的红色。
CaMoO4 phosphors with Eu^3＋ as activated ions were synthesized by ultrasonic assisted coprecipitation. The samples were characterized by X-ray diffraction, scanning electron microscopy （SEM） and fluorescence spectrophotometer. The effects of reaction parameters such as solvent concentration, active agent, addition of active agent and ultrasonic time on the luminescent properties of CaMoO4： Eu^3＋ were studied. The results show that the crystal with regular prepared sample is pure phase tetragonal CaMoO4 shape, and the energy transfer of MoO4^2- to Eu^3＋ exists in CaMoO4： Eu^3＋. The maximum concentration of CaMoO4： Eu^3＋ was determined by the addition of 50% acetone solution as solvent, PEG addition amount of 9 mL, Eu^3＋ doping concentration of 10%, ultrasonic time of 10 min and with the excitation of 393 nm, the strongest peak of CaMoO4： Eu^3＋ was at 616 nm, and the effective red light emission was realized. The samples show bright red under the UV lamp.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2018年第1期207-212,共6页
Journal of Synthetic Crystals
基金
新疆维吾尔自治区高校科研计划重点项目(XJEDU2016I044)
自治区研究生科研创新项目(XJGRI2016137)
