Journal of The Electrochemical Society · 1972 · 227 citations · 0 references
Natural SciencesChemistryMaterials ScienceCrystal StructureInorganic ChemistrySolid-state ChemistryCrystal ChemistryInorganic MaterialsLuminescent MaterialsPhosphorescence SpectroscopyChemical Vapor TransportInorganic PhosphorsPhosphor MaterialsPhosphorescent MaterialsPhosphorsPolycrystalline Material SynthesisPowder DiffractionPowder Diffraction Analysis
Alkaline earth thiogallates form a new class of sulfide phosphors. The study describes the luminescence properties of the host compounds and Ce³⁺/Eu²⁺‑activated phosphors. Thiogallate compounds were synthesized via solid‑state reaction, and their alkaline earth derivatives were grown as single crystals by vapor transport. X‑ray diffraction revealed cubic and orthorhombic structures for the single crystals, while powder diffraction showed all derivatives are isostructural with the Sr analogue; rare‑earth substitution yields phosphors that fluoresce strongly under UV and cathode rays.
Thiogallate compounds represented by the formula were prepared by solid‐state reaction. Single crystals of the alkaline earth derivatives were also obtained by vapor transport of the corresponding polycrystalline material. X‐ray diffraction analyses of the single crystals show that is cubic belonging to space group while and are isomorphous belonging to the orthorhombic space group . X‐ray powder diffraction results on the other derivatives indicate that they are all isostructural with the Sr analogue. The alkaline earth thiogallates are the basis of a new type of sulfide phosphor. Rare earth ions readily substitute for the alkaline earth in the host lattice resulting in phosphors that fluoresce strongly under ultraviolet and cathode rays. The luminescence properties of the host compounds and the Ce+3 and Eu+2‐Activated phosphors are described.