Unexpected photoluminescence from Mn2+ in LiZnNbO4
| Autor: | A. López, G.K.B. Costa, G.B.M. Melo, Lilian P. Sosman, S.S. Pedro |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Photoluminescence Rietveld refinement Organic Chemistry Doping 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Ion Inorganic Chemistry Condensed Matter::Materials Science Impurity Excited state X-ray crystallography Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Excitation |
| Zdroj: | Optical Materials. 99:109566 |
| ISSN: | 0925-3467 |
| Popis: | In this paper the synthesis of the LiNbZnO4 doped with Mn2+ by solid state method and its photoluminescence results are presented. The structural analysis was performed by X-ray diffraction and Rietveld refinement, while the emission of the impurity ion into this structure was investigated by photoluminescence and excitation measurements. The photoluminescence spectrum presented a broad band centered at 700 nm, associated to the transition of Mn2+ from the excited state 4T1 (4G) to the 6A1(6S) fundamental state. Crystal field parameter Dq and Racah parameters B and C were estimated using the transition energies observed in the excitation spectrum. Photoluminescence results indicate that the emission is related to an unexpected octahedral site occupation of Mn2+ in the LiZnNbO4 lattice. |
| Databáze: | OpenAIRE |
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