| Luminescence properties of nitrogen-rich Ca-SiAlON:Eu2+ phosphors prepared by freeze-drying assisted combustion synthesis |
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| 作者姓名： | Zhang-lin Chen Kai Liu Xuan-yi Yuan Ke-xin Chen |
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| 作者单位： | Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-nano Devices;State Key Laboratory of New Ceramics and Fine Processing |
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| 基金项目： | This work was financially supported by the Chinese Academy of Sciences(CAS)Interdisciplinary Innovation Team;the Fundamental Research Funds for the Central Universities;the Research Funds of Renmin University of China(No.19XNLG13). |
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| 摘 要： | Nitrogen-rich Eu2+-doped Ca-α-SiAlON phosphors(Cam/2-xSi12-m-nAlm+nOnN16-n:xEu) were synthesized by a freeze-drying assisted combustion synthesis(CS) route. Fast-synthesized products with high purity and uniform particle morphology were confirmed by X-ray diffraction(XRD) and scanning electron microscopy(SEM). The analysis of lattice parameters by comparison with empirical equations showed that the as-prepared phosphors had low oxygen content. A series of samples were prepared according to the stoichiometry of Cam/2-0.08Si12-mAlmN16:0.08 Eu for further research. The influences of m value on the luminescence properties were investigated in detail. As m increased, a redshift phenomenon was observed in both the excitation and emission spectra. First-principle electronic structure calculations showed that the 3d energy level of Ca played an important role in the occurrence of the redshift phenomenon.
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| 关 键 词： | FREEZE-DRYING combustion synthesis PHOSPHORS powder fluorescence SPECTRA FIRST-PRINCIPLE calculation |
Luminescence properties of nitrogen-rich Ca-SiAlON:Eu2+ phosphors prepared by freeze-drying assisted combustion synthesis |
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| Zhang-lin Chen,Kai Liu,Xuan-yi Yuan,Ke-xin Chen.Luminescence properties of nitrogen-rich Ca-SiAlON:Eu2+ phosphors prepared by freeze-drying assisted combustion synthesis[J].International Journal of Minerals,Metallurgy and Materials,2020,27(5):687-692. |
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