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Preparation and Luminescence Properties of La7O6(BO3)(PO4)2: Tb3+/Eu3+ Phosphors
Author NameAffiliationE-mail
LI Shi-Long Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China  
LÜ Chao Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China  
MIN Xin Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China minx@cugb.edu.cn 
FANG Ming-Hao Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China  
HUANG Zhao-Hui Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China  
LIU Yan-Gai Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China  
Abstract: La7O6(BO3)(PO4)2:Tb3+ and La7O6(BO3)(PO4)2:Eu3+ phosphors were prepared by a high-temperature solid state reaction, and the phase behavior, crystal structure, luminescence properties and thermal stability were investigated. The La7O6(BO3)(PO4)2:Eu3+ phosphors emitted a red light under the ultraviolet excitation. The emission maximum was at 616 nm, corresponding to the 5D0-7F2 transition of Eu3+. The concentration quenching pheno-menon was observed when the doping concentration of Eu3+ ion was beyond 0.08. The corresponding CIE coordinates were calculated to be (0.610 2, 0.382 3). The La7O6(BO3)(PO4)2:Tb3+ phosphors emitted a green light under the ultraviolet excitation. The emission maximum was at 544 nm, corresponding to the 5D4-7F5 transition of Tb3+. Concentration quenching phenomenon was observed when the concentration of Tb3+ ion was beyond 0.15, and its CIE coordinates are calculated to be (0.317 7, 0.535 2). Based on the analysis of temperature-dependent emission spectra of La7O6(BO3)(PO4)2:Tb3+ and La7O6(BO3)(PO4)2:Eu3+ phosphors, it can be found that both phosphors possess good thermal stability.
Keywords: phosphors  photoluminescence properties  Eu3+  Tb3+  La7O6(BO3)(PO4)2
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LI Shi-Long,LÜ Chao,MIN Xin,FANG Ming-Hao,HUANG Zhao-Hui,LIU Yan-Gai.Preparation and Luminescence Properties of La7O6(BO3)(PO4)2: Tb3+/Eu3+ Phosphors[J].Chinese Journal of Inorganic Chemistry,2017,33(5):761-768.
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Chinese Journal of Inorganic Chemistry