Abnormal temperature dependent luminescence behavior of CaSrSiO4:Eu2+ phosphors synthesized via sol-gel strategy
| Autor: | Kiwan Jang, M. Jayasimhadri, Hyun-Joo Woo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Photoluminescence Materials science Dopant business.industry Mechanical Engineering Doping Metals and Alloys Analytical chemistry Phosphor 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Optics Mechanics of Materials 0103 physical sciences Materials Chemistry Emission spectrum Chromaticity 0210 nano-technology business Spectroscopy Luminescence |
| Zdroj: | Journal of Alloys and Compounds. 703:80-85 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2017.01.184 |
| Popis: | A silicate based crystal doped with Eu 2+ phosphors have been synthesized by sol-gel method using propylene glycol modified silane (PGMS). The structural and luminescence properties of the as-prepared samples were well characterized by using x-ray diffractometer (XRD) & photoluminescence spectroscopy. Thermal stability of the prepared phosphors was also measured and analyzed in detail. The results revealed a new fact that longer wavelength emission band position is relatively more sensitive to the sample temperature for higher dopant concentrations when compared to the other emission bands. Such observations were not found in the samples prepared by solid phase reaction method. The CaSrSiO 4 phosphor doped with 3 mol % of Eu 2+ showed unique optical properties that consist of a shift in emission spectrum towards shorter wavelength along with a decreased band width (FWHM). The emission color tunability with the increase in temperature and concentration of the CaSrSiO 4 phosphor were also discussed by CIE chromaticity diagram. |
| Databáze: | OpenAIRE |
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