摘要
采用高温固相法合成了Dy^3+、Eu^3+共掺杂Y3MgAl3SiO12石榴石型荧光粉。采用XRD、荧光光谱仪等仪器对样品的结构以及光谱特性进行表征,探究了Dy^3+/Eu^3+在Y3MgAl3SiO12基质结构中的光谱特征以及离子间的能量传递机制。在367 nm近紫外光激发下,Y3MgAl3SiO12:Dy^3+,Eu^3+的发射光谱包含Dy^3+的6F9/2到6H15/2和6H13/2的电子跃迁特征发射(487 nm蓝光和592 nm黄光)和Eu^3+的5D07F2 and 5D07F4特征发射峰(616 nm和710 nm红光)。在400~500 nm范围内Dy^3+发射谱与Eu^3+激发谱重叠,表明Dy^3+与Eu^3+之间存在着能量传递,能量传递的机理为电四极-电四极相互作用。该荧光粉通过调整Dy^3+和Eu^3+的掺杂浓度比封装近紫外LED芯片,可以实现单基质暖白光LED照明。
Dy^3+,Eu^3+co-doped Y3MgAl3SiO12 phosphors were prepared by high temperature solid state reaction method.The structure and spectral characteristics of the samples were characterized by XRD and fluorescence spectrometer.The crystal sites and spectral characteristics of Dy^3+/Eu^3+in Y 3MgAl 3SiO 12 host along with energy transfer mechanism between both ions were investigated.Under the excitation of 367 nm near-ultraviolet light,the emission spectrum of Y3MgAl3SiO12:Dy^3+,Eu^3+con-tained the characteristic transition of 6F9/2 to 6H15/2(487nm blue emission)and 6H13/2(592 nm yellow emission)of Dy^3+and the 5D07F2 and 5D07F4characteristic emission of Eu^3+(616 nm and 710 nm red emission).There were energy transfers of quadrupole quadrupole interaction between Dy^3+and Eu^3+resulting from optical overlap between the PL of Dy^3+and the PLE of t Eu^3+in the range of 400~500 nm.Supposed that packaging the near-ultraviolet LED chip,the phosphor provided a strategy to realize single-substrate warm white LED illumination by adjusting the doping concentration ratio of Dy^3+and Eu^3+.
作者
童二宝
徐明学
宋开新
高惠芳
赵平海
沈少骅
武军
徐军明
TONG Erbao;XU Mingxue;SONG Kaixin;GAO Huifang;ZHAO Pinghai;SHEN Shaohua;WU Jun;XU Junming(School of Electronics Information,Hangzhou Dianzi University,Hangzhou 310018,China;Zhejiang Kaiyuan Photoelectric Lighting Technology Co.,Ltd.,Hangzhou 310051,China)
出处
《电子科技》
2020年第8期65-69,共5页
Electronic Science and Technology
基金
国家自然科学基金(51672063,51202051)
浙江省科技计划项目(2016C31110)
上海硅酸盐研究所,无机功能材料与器件重点实验室开放项目,(KLIFMD201708)
浙江省公益性技术应用研究计划项目(2016C31110)
浙江开元光电照明科技有限委托项目。
