Effect of annealing temperature on luminescence properties of ZnWO 4 :Eu 3+ nanophosphor

Micro & nano letters

article

Chunyang Li¹  Xiaodi Du²  Yurong Shi¹  Zhenling Wang¹ 

[1] The Key Laboratory of Rare Earth Functional Materials and Applications, Zhoukou Normal University;College of Chemistry and Chemical Engineering, Zhoukou Normal University

关键词: crystal morphology;    nanofabrication;    visible spectra;    zinc compounds;    photoluminescence;    X-ray diffraction;    ultraviolet spectra;    phosphors;    scanning electron microscopy;    precipitation (physical chemistry);    annealing;    europium;    field emission scanning electron microscopy;    nanostructured materials;    annealing temperature;    luminescence properties;    zinc tungstate;    self-activating phosphor;    broad band blue-green emission;    ultraviolet excitation;    liquid precipitation method;    X-ray diffraction;    transmission electron microscopy;    field emission scanning electron microscopy;    photoluminescence spectra;    luminescent properties;    emission colour;    morphology;    crystallinity;    crystal defects;    temperature 900.0 degC;    ZnWO4Eu3+;   

DOI  :  10.1049/mnl.2018.5651

学科分类：计算机科学（综合）

来源: Wiley

【 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】

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