Spectral studies of highly Dy3+ doped PbO–ZnO–B2O3–P2O5 glasses
| Autor: | M. Reza Dousti, Tasso O. Sales, Raja J. Amjad, Abdul Sattar, Carlos Jacinto |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Lanthanide
Photoluminescence Materials science Biophysics Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics 0104 chemical sciences Ion Phosphate glass chemistry Excited state Chromaticity 0210 nano-technology Lead oxide |
| Zdroj: | Journal of Luminescence. 231:117839 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2020.117839 |
| Popis: | Phosphate glasses having composition 50P2O5–10B2O3–20ZnO–20PbO–xDy2O3 where x = 0.04, 0.18, 0.36, 1.10, 1.80, and 3.60 mol% were prepared by melt quenching technique. The FTIR spectra reveal the different structural groups of the phosphate glass induced by modifiers such as lead oxide and zinc oxide, which could be explained in terms of the distortion of PO4 tetrahedra and the network depolymerization process. The photoluminescence spectrum shows three prominent emission bands centered at 475, 586, and 675 nm corresponds to the 4F9/2 → 6HJ (J = 11/2, 13/2, 15/2) transitions, respectively, and the intensity ratio of yellow to blue emissions are enhanced as the concentration of Dy3+ ions increased up to 3.60 mol%. The 4F9/2 excited state's lifetime decreases by continuously increasing the amount of the trivalent lanthanide ion due to probable energy transfer between neighboring ions. The chromaticity diagram is studied as the rare-earth ion concentration, which gives the nearest condition to the white color at 0.36 mol% of the Dy3+ ions. |
| Databáze: | OpenAIRE |
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