Luminescence properties of Tb{sup 3+} and Eu{sup 3+} doped beyerite CaBi{sub 2}O{sub 2}(CO{sub 3}){sub 2}
Highlights: • Synthesis of Tb{sup 3+}, Eu{sup 3+} doped and codoped (Tb{sup 3+}/Eu{sup 3+}) beyerite, CaBi{sub 2}O{sub 2}(CO{sub 3}){sub 2}. • Excellent luminescent properties in the visible region. • Tunable colors by varying Tb{sup 3+} to Eu{sup 3+} ratio using beyerite as the host lattice. - Abstract: Mineral Beyerite belonging to the sillen family consisting of [Bi{sub 2}O{sub 2}]{sup 2+} layers along with Ca{sup 2+} ions possesses a layer sequence of (Bi{sub 2}O{sub 2}){sup 2+}- CO{sub 3}{sup 2−}- Ca{sup 2+} - CO{sub 3}{sup 2−}- (Bi{sub 2}O{sub 2}){sup 2+} in such a way that the plane of the (CO{sub 3}){sup 2−} group is orthogonal to the plane of the layer. By employing a single step hydrothermal process, beyerite, Tb{sup 3+}, Eu{sup 3+} incorporated beyerite along with codoped Tb{sup 3+}/Eu{sup 3+} samples of beyerite have been successfully synthesized. The samples were characterized by powder X-ray diffraction combined with Rietveld refinement, fourier transform infrared spectra, diffuse reflectance and photoluminescent measurements. Emission characteristics of Tb{sup 3+} and Eu{sup 3+} samples under excitation in the UV region showed excellent luminescent properties in the visible region confirming the presence of rare earth dopants. Tunable colors in a wide range is also possible by varying the relative doping ratios of Tb{sup 3+} and Eu{sup 3+} in the codoped beyerite samples indicating CaBi{sub 2}O{sub 2}(CO{sub 3}){sub 2} to be a potential host lattice.
- OSTI ID:
- 22730460
- Journal Information:
- Materials Research Bulletin, Vol. 95; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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