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Whitlockite-Type Structure as a Matrix for Optical Materials: Synthesis and Characterization of Novel TM-SM Co-Doped Phosphate $Ca_{9}Gd(PO_{4})_{7}$, a Single-Phase White Light Phosphors
| Content Provider | MDPI |
|---|---|
| Author | Nikiforov, Ivan V. Deyneko, Dina V. Spassky, Dmitry A. Lazoryak, Bogdan I. Aksenov, Sergey M. |
| Copyright Year | 2022 |
| Description | A series of novel phosphates with the general formulas $Ca_{9}Gd_{0.9−x}Tm_{0.1}Sm_{x}(PO_{4})_{7}$ and $Ca_{9}Gd_{0.9−y}Tm_{y}Sm_{0.1}(PO_{4})_{7}$ were synthesized by solid-state method. As-obtained phosphates were characterized by powder X-ray diffraction and second harmonic generation analyses, dielectric measurements, luminescence spectroscopy. All samples were single phase and characterized by the whitlockite-type structure with space group R3c. An influence of admixture concentration of $REE^{3+}$ ions in the initial host on dielectric properties was studied in details. Synthesized phosphates are characterized by intensive luminescence. The emission in the orange region of the visible spectrum is observed for $Ca_{9}Gd_{0.9}Sm_{0.1}(PO_{4})_{7}$ with a maximum intensity band at 602 nm. The line in blue region at 455 nm, which corresponds to$ $^{1}$D_{2}$ →$ $^{3}$F_{4}$ $Tm^{3+}$ transition, is registered for $Ca_{9}Gd_{0.9}Tm_{0.1}(PO_{4})_{7}$. Emission in the white region of CIE coordinates was registered for Tm-Sm co-doped compounds. |
| Starting Page | 76 |
| e-ISSN | 2075163X |
| DOI | 10.3390/min12010076 |
| Journal | Minerals |
| Issue Number | 1 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-01-09 |
| Access Restriction | Open |
| Subject Keyword | Minerals Phosphates Luminescence Spectroscopy Whitlockite-type Compounds Energy Transfer Cation Distribution Thulium Samarium |
| Content Type | Text |
| Resource Type | Article |
