Hydrothermal synthesis and luminescent properties of Ca3(PO4)2: Dy3+ white-emitting phosphors
作者： Xiaofang Yu , Dengwen Yuan , Xiaoyun Mi
DOI: 10.1016/J.JALLCOM.2020.157585
关键词:
摘要: Abstract The white-emitting Ca3(PO4)2: Dy3+ phosphors were prepared via hydrothermal synthesis. characterized by XRD, TEM, SEM, EDS, GSAS structural refinement and PL spectroscopy, respectively. Rietveld demonstrated that the Ca3(PO4)2 crystal structure consisted of [PO4] tetrahedrons filled with Ca atoms. ions occupied high-symmetry sites due to emission intensity 4F9/2 → 6H15/2 was strongest. Moreover, pH value calcination temperature had important effects on phosphor morphology luminescent properties. samples changed from long-rod short-rod sphere size reduced as in initial reaction solution increased. 7 best luminescence properties, precursor before corresponded Ca4P2O9. With increased, nanorods grains diameters about 1 μm, properties improved continuously. CIE coordinate (0.283, 0.343). has better application prospects for white light-emitting diodes.
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