Study on the Preparation of Ba3Si6O9N4∶Eu2+ Phosphor and the Characterization of Their Luminescence Properties
PAN Hua-yan1, WANG Le1*, LUO Dong1, LI Yang-hui1, 2, ZHANG Hong2, SHEN Ye2
1. College of Optics and Electronic Science and Technology, China Jiliang University, Hangzhou 310018, China 2. State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
Abstract：Ba3Si6O9N4∶Eu2+ phosphors were synthesized by two-step synthesis processes based on high temperature solid phase using BaSiO3 as a precursor. The influence mechanism of the Eu2+ doping concentration to the luminescence properties of Ba3Si6O9N4∶Eu2+ phosphors were mainly investigated. This paper made a comparison between the luminescence properties of Ba3Si6O9N4∶Eu2+ phosphors prepared by two-step processes and solid- state reaction method. The results showed that the Ba3Si6O9N4∶Eu2+ phosphors synthesized by two-step processes had higher purity and higher crystallinity. There exists concentration quenching in Ba3Si6O9N4∶Eu2+ phosphors for both two-step processes and solid-state reaction when the doping concentration x is more than 9%. Both the concentration quenching mechanism of Ba3Si6O9N4∶Eu2+ phosphor prepared by solid-state reaction and two-step processes is electric dipole-dipole interaction. The emission peak of Ba3Si6O9N4∶Eu2+ phosphors (peak 489 nm) prepared by two-step processes had a blue shift compared to the emission peak of Ba3Si6O9N4∶Eu2+ phosphors (peak 512nm) prepared by solid-state reaction. The emission peak of Ba3Si6O9N4∶Eu2+ phosphors prepared by two-step processes relatively close to the theoretical value (480 nm). The spectrum analysis result showed that the element component of Ba3Si6O9N4∶Eu2+ phosphors prepared by two-step processes was closer to the theoretical value, it means that the two-step processes can effectively reduce the lattice defects. The Ba3Si6O9N4∶Eu2+ phosphors synthesized by two-step processes had better thermal stability, which demonstrates to be a highly promising phosphor for white-LED applications.
潘桦滟1，王 乐1*，罗 东1，李旸晖1, 2，张 宏2，沈 烨2 . Ba3Si6O9N4∶Eu2+荧光粉制备及其表征 [J]. 光谱学与光谱分析, 2016, 36(03): 657-661.
PAN Hua-yan1, WANG Le1*, LUO Dong1, LI Yang-hui1, 2, ZHANG Hong2, SHEN Ye2 . Study on the Preparation of Ba3Si6O9N4∶Eu2+ Phosphor and the Characterization of Their Luminescence Properties. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(03): 657-661.
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