Efficient energy transfer and luminescence properties of CaY(GaO)(BO):Tb,Eu as a green-to-red colour tunable phosphor under near-UV excitation.
作者信息
Khan Wasim Ullah, Li Junhao, Li Xiaohui, Wu Qili, Yan Jing, Xu Yiqin, Xie Feiyan, Shi Jianxin, Wu Mingmei
机构信息
Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China.
Guangdong Institute of Semiconductor Industrial Technology, Guangzhou 510650, P. R. China.
出版信息
Dalton Trans. 2017 Feb 14;46(6):1885-1891. doi: 10.1039/c6dt04304f.
A series of CaY(GaO)(BO):Tb,Eu phosphors were prepared by a high-temperature solid-state reaction. Their phase structures were confirmed by powder X-ray diffraction and the element distribution was measured using transmission electron microscopy elemental mapping. The photoluminescence emission and excitation spectra and fluorescence lifetime were studied and discussed in detail. The results revealed that Eu ions can be efficiently sensitized by Tb ions under near-UV excitation. In addition, the energy transfer efficiency can be controlled by adjusting the ratio of Eu and Tb to realize colour tunable emission from green to red. For CaY(GaO)(BO):0.50Tb,0.10Eu, the emission intensity at 425 K is 78.11% of that at 300 K, being available to near-UV LEDs.
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