Properties of Mn[sup 4+]-Activated Hexafluorotitanate Phosphors
Source abstract
Abstract
Alkali hexafluorotitanate red phosphors ( , Cs, and Na) are synthesized by chemical etching of in aqueous hydrofluoric acid (HF)/alkali permanganate /alkali fluoride (AF) solutions. X-ray diffraction patterns suggest that the synthesized phosphors have a trigonal symmetry with the space groups ( and ) and . The luminescent properties of the phosphors are studied by photoluminescence (PL) analysis and PL excitation spectroscopy. Trigonal distortion splits the threefold degenerate , , and vibronic emission lines. The Raman scattering of is also investigated using a triple monochromator at room temperature. The infrared- and Raman-active fundamental frequencies are determined and discussed from the viewpoint of crystal symmetry.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Gas Sensing Nanomaterials and Sensors · GaN-based semiconductor devices and materials
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