【 摘 要 】
Zinc tungstate (ZnWO 4 ) is a self-activating phosphor and exhibits a broad band blue-green emission under ultraviolet excitation. When doped with Eu 3+ ions, ZnWO 4 may emit white light due to the fact that WO 4 2− could effectively transfer energy to Eu 3+ ion. In this work, ZnWO 4 :Eu 3+ phosphors were fabricated by the liquid precipitation method, and then X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, and photoluminescence spectra were used to investigate the morphology, structure, and luminescent properties. The emission colour of synthesised ZnWO 4 :Eu 3+ phosphors can be tuned from pink to white with increasing the annealing temperature, which may be attributed to the change of the crystallinity and the crystal defects in ZnWO 4 :Eu 3+ phosphors. What is more, ZnWO 4 :Eu 3+ phosphors emit an idea white light with the Commission International de L'Eclairage coordinates (0.32, 0.32) after annealing at 900°C.
【 授权许可】
CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND
【 预 览 】
Files | Size | Format | View |
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RO202107100002812ZK.pdf | 538KB | download |