Tungstate flux-grown Y 10 W 2 O 21 :Eu 3+ phosphors with enhanced particle size and luminescence properties
| Autor: | Masahiro Yoshimura, Tzu Chin Chien, Chii Shyang Hwang, Yung Tang Nien |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Photoluminescence
Materials science Scanning electron microscope Process Chemistry and Technology Analytical chemistry Mineralogy Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Thermogravimetry chemistry.chemical_compound Tungstate chemistry Differential thermal analysis Materials Chemistry Ceramics and Composites Thermal stability 0210 nano-technology Luminescence |
| Zdroj: | Ceramics International. 43:9437-9442 |
| ISSN: | 0272-8842 |
| Popis: | Eu 0.5 Y 9.5 W 2 O 21 strong red emission phosphors were synthesized via a conventional solid-state reaction method with environmentally friendly tungstate flux (M 2 WO 4 , M=Li, Na, K). The growth process of the Eu 0.5 Y 9.5 W 2 O 21 phosphors was studied using X-ray diffraction, scanning electron microscopy, and thermogravimetry/differential thermal analysis. The photoluminescence properties, including emission and excitation spectra and thermal stability, were also investigated. The experimental results indicate that the particle size and morphology of the Eu 0.5 Y 9.5 W 2 O 21 phosphors depend on the type and content of tungstate flux. The luminescence intensities of the phosphors were effectively enhanced by the tungstate flux. The results also show that the Eu 0.5 Y 9.5 W 2 O 21 phosphors are very suitable for use in near-ultraviolet light-emitting diode (LED) chips (392 nm) and blue LED chips (465 nm). |
| Databáze: | OpenAIRE |
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