Abstract
Alkaline earth orthosilicates M2SiO4 (M = Ba, Sr and Ca) phosphors doped with Mn5+ ions have been prepared by the conventional solid-state reaction method. The crystal structures were verified by X-ray diffraction. By varying the host composition from Ba to Ca, the position shifting of photoluminescence emission bands corresponding to the 1E → 3A2 transition are induced by the increasing angular distortion and covalence. The nonradiative energy transfer becomes a dominant role in the photoluminescence process with substituting Ba2+ sites for smaller cations. The structural evolution and relevant luminescence mechanisms in (Ba1−xCax)2SiO4 phosphors also have been investigated in detail. It reveals that the chemical composition modification and structural variation can be an efficient approach to optimize the photoluminescence behaviors.
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This work was financially supported by the National Natural Science Foundation of China (Grants No. 51472091), Guangdong Natural Science Foundation (Grants No. S2011030001349).
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Zhang, X., Nie, J., Liu, S. et al. Structural variation and near infrared luminescence in Mn5+-doped M2SiO4 (M = Ba, Sr, ca) phosphors by cation substitution. J Mater Sci: Mater Electron 29, 6419–6427 (2018). https://doi.org/10.1007/s10854-018-8622-2
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DOI: https://doi.org/10.1007/s10854-018-8622-2