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Synthesis, crystal structure and luminescence properties of a new samarium borate phosphate, CsNa2Sm2(BO3)(PO4)2
- Source :
- Acta Crystallographica Section C Structural Chemistry. 76:1068-1075
- Publication Year :
- 2020
- Publisher :
- International Union of Crystallography (IUCr), 2020.
-
Abstract
- A new caesium sodium samarium borate phosphate, CsNa2Sm2(BO3)(PO4)2, has been obtained successfully by the high-temperature solution growth (HTSG) method and single-crystal X-ray diffraction analysis reveals that it crystallizes in the orthorhombic space group Cmcm. The structure contains BO3, PO4, NaO7 and SmO7 polyhedra which are interconnected via corner- or edge-sharing O atoms to form a three-dimensional [Na2Sm2(BO3)(PO4)2]â network. This network delimits large cavities where large Cs+ cations reside to form the total structure. Under 402 nm light excitation, CsNa2Sm2(BO3)(PO4)2 exhibits three emission bands due to the 4fâ4f transitions of Sm3+. Furthermore, we introduced Gd3+ into Sm3+ sites to optimize the Sm3+ concentration and improve the luminescence intensity. The optimal concentration is Gd/Sm = 98/2. The luminescent lifetime of a series of CsNa2Gd2(1âx)Sm2x (BO3)(PO4)2 phosphors shows a gradual degradation of lifetime from 2.196 to 0.872 ms for x = 0.01â0.10. The Commission Internationale de l'Eclairage (CIE) 1931 calculation reveals that CsNa2Gd1.96Sm0.04(BO3)(PO4)2 can emit orange light under 402 nm excitation.
- Subjects :
- Diffraction
Chemistry
chemistry.chemical_element
Phosphor
02 engineering and technology
Crystal structure
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Inorganic Chemistry
Samarium
Crystallography
Caesium
Materials Chemistry
Physical and Theoretical Chemistry
0210 nano-technology
Boron
Luminescence
Excitation
Subjects
Details
- ISSN :
- 20532296
- Volume :
- 76
- Database :
- OpenAIRE
- Journal :
- Acta Crystallographica Section C Structural Chemistry
- Accession number :
- edsair.doi...........27934456c7ca90080fa2c675737609d3