具有冰晶石结构的KLuF:Tb,Eu多色磷光体的发光特性及能量转移
Luminescence properties and energy transfer of KLuF:Tb,Eu multicolor phosphors with a cryolite structure.
作者信息
Yang Dan, Liao Libing, Guo Qingfeng, Mei Lefu, Liu Haikun, Zhou Tianshuai, Ye Huan
机构信息
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences Beijing 100083 China
School of Gemology, China University of Geosciences Beijing 100083 China.
出版信息
RSC Adv. 2019 Feb 1;9(8):4295-4302. doi: 10.1039/c8ra10059d. eCollection 2019 Jan 30.
In recent years, compounds with a cryolite structure have become excellent hosts for luminescent materials. In this paper, Tb doped and Tb/Eu co-doped KLuF phosphors were prepared a high temperature solid phase sintering method. The XRD, SEM, as well as photoluminescence excitation (PLE) and emission (PL) spectra were measured to investigate the structure and luminescence properties of the as-prepared samples. In the Tb/Eu co-doped KLuF samples, both characteristic emission spectra of Tb and Eu could be observed and the emission color of the KLuF:0.12Tb,Eu phosphors could be adjusted from green to yellowish pink and the corresponding CIE values could be regulated from (0.2781, 0.5407) in the green area to (0.4331, 0.3556) in the yellowish pink area by controlling the concentration ratio of Eu/Tb. In addition, the energy transfer mechanism in Tb/Eu co-doped KLuF was calculated to be a quadrupole-quadrupole interaction from Tb to Eu based on the Dexter's equation.
近年来，具有冰晶石结构的化合物已成为发光材料的优良基质。本文采用高温固相烧结法制备了Tb掺杂和Tb/Eu共掺杂的KLuF荧光粉。通过测量XRD、SEM以及光致发光激发（PLE）和发射（PL）光谱来研究所制备样品的结构和发光性能。在Tb/Eu共掺杂的KLuF样品中，可以观察到Tb和Eu的特征发射光谱，并且通过控制Eu/Tb的浓度比，KLuF:0.12Tb,Eu荧光粉的发射颜色可以从绿色调节到黄粉色，相应的CIE值可以从绿色区域的(0.2781, 0.5407)调节到黄粉色区域的(0.4331, 0.3556)。此外，基于德克斯特方程计算得出，Tb/Eu共掺杂KLuF中的能量转移机制为从Tb到Eu的四极-四极相互作用。
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