Multicolor emission and energy transfer dynamics in thermally stable Dy3+/Eu3+ co-doped ZPBT glasses for epoxy free w-LEDs application
| Autor: | M. Jayasimhadri, Kaushal Jha, Kiwan Jang, Amit K. Vishwakarma, D. Haranath |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Doping Analytical chemistry Zinc phosphate 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Emission intensity Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry law 0103 physical sciences Barium titanate Materials Chemistry Ceramics and Composites Thermal stability Chromaticity 0210 nano-technology Excitation Light-emitting diode |
| Zdroj: | Journal of Non-Crystalline Solids. 553:120516 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2020.120516 |
| Popis: | Dy3+ doped and Dy3+/Eu3+ co-doped zinc phosphate barium titanate (ZPBT) glasses were successfully synthesized by melt quenching procedure. The co-doped glasses revealed emission peaks in the blue, yellow, orange, and red spectral regions. The combinations of these emission yield white light (cool, neutral, and warm) and orangish-red light. The tunable emission is attained by appropriately regulating Eu3+ concentrations and excitation wavelengths. The emission and decay analysis revealed the energy transfer arising due to dipolar-dipolar interaction from Dy3+ to Eu3+. The emission intensity and the chromaticity shift observed at 423 K were 72.54 % and 7.74 ×10−3, respectively signifying the strong thermal stability of the co-doped ZPBT glass. An epoxy-resin free device was demonstrated using 1.0 mol% Dy3+/Eu3+ co-doped glass and 385 nm n-UV LED chip. The results mentioned-above indicate that Dy3+/Eu3+ co-doped synthesized glasses are promising candidates for epoxy-free high powered w-LED applications under n-UV excitation. |
| Databáze: | OpenAIRE |
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