Near-infrared downconversion in Ce3+–Yb3+ co-doped YAG
| Autor: | Prakash R. Somani, N. S. Sawala, S.K. Omanwar |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence business.industry Near-infrared spectroscopy Analytical chemistry Phosphor 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Optics law 0103 physical sciences Solar cell Quantum efficiency Crystalline silicon Electrical and Electronic Engineering 0210 nano-technology business Luminescence Powder diffraction |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 28:142-147 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | The phosphors YAG co-doped with Ce3+–Yb3+ ion pair were successfully synthesized by solid state reaction method varying the concentration of Yb3+ ions from 1 to 15 % mol. The phosphors were characterized by powder X-ray powder diffraction and surface morphology was studied by scanning electronic microscope. The photoluminescence (PL) properties were studied by spectrophotometers in near infra red (NIR) and ultra violet visible region. The synthesized phosphors can convert a photon of blue region (469 nm) into photons of NIR region (979 and 992 nm). The co-operative energy transfer was studied by time decay curve and PL spectra. The theoretical value of quantum efficiency was calculated from steady time decay measurement and the maximum efficiency approached up to 145.19 %. Hence this phosphor could be used as a downconversion luminescent convertor in front of crystalline silicon solar cell (c-Si) panels to reduce thermalization loss due to spectral mismatch of the solar cells. |
| Databáze: | OpenAIRE |
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