Pan Yu, Wang Wenjun, Zhu Yuhan, Xu Haibing, Zhou Liqun, Noh Hyeon Mi, Jeong Jung Hyun, Liu Xiaoguang, Li Ling
Hubei Collaborative Innovation Center for Advanced Organochemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University Wuhan 430062 China
Department of Physics, Pukyong National University Busan 608-737 Korea
RSC Adv. 2018 Jul 2;8(42):23981-23989. doi: 10.1039/c8ra04432e. eCollection 2018 Jun 27.
CaY Al O:2%Eu ( = 0, 0.1, 0.2) phosphors have been synthesized a solid-state reaction process. XRD patterns indicate that they are pure phase. The photoluminescence properties of the CaY Al O:2%Eu phosphors exhibit both the blue emission of Eu (4f5d-4f) and red-orange emission of Eu (D-F) under UV light excitation, which showed that the Eu co-doping system was obtained by adjusting the Al/Y ratio. Eu ions can be reduced to Eu ions when the Al/Y ratio was changed. In this work, the bond energy method was used to determine and explain the mechanism of the site occupation of Eu ions entering the host matrix. Also, the emission spectrum showed an unusual comparable intensity D-F transition peak. The relative intensity of D-F and D-F can be stabilized by changing the relative proportions of Al and Y. Furthermore, this was explained by the J-O theory.
通过固态反应法合成了CaYAlO:2%Eu（=0, 0.1, 0.2）荧光粉。X射线衍射图谱表明它们为纯相。CaYAlO:2%Eu荧光粉的光致发光特性在紫外光激发下呈现出Eu（4f5d-4f）的蓝色发射和Eu（D-F）的红橙色发射，这表明通过调节Al/Y比获得了Eu共掺杂体系。当Al/Y比改变时，Eu离子可被还原为Eu离子。在这项工作中，采用键能法来确定并解释Eu离子进入基质的占位机制。此外，发射光谱显示出异常的强度可比的D-F跃迁峰。通过改变Al和Y的相对比例，可以稳定D-F和D-F的相对强度。此外，这由J-O理论进行了解释。
