Synthesis of luminescent KY₃F₁₀ nanopowder multi-doped with lanthanide ions by a co-precipitation method

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• 作者：Szymon Goderski^a ; Marcin Runowski^a ; Stefan Lis^a ; ^{blis@amu.edu.pl" class="auth_mail" title="E-mail the corresponding author}
• 关键词：fluorides ; co-precipitation ; nanophosphors ; luminescence ; nanopowders ; Ce3+/Gd3+/Eu3+ doping ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：34
• 期：8
• 页码：808-813
• 全文大小：2749 K

文摘

A series of KY₃F₁₀ nanophosphors doped with Gd³⁺, Ce³⁺ and Eu³⁺ ions were obtained with the use of a co-precipitation method. The resulting products were white precipitates, consisting of spherical particles with diameter about 150–200 nm, which was confirmed using transmission electron microscopy (TEM) technique. Powder X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX) measurements confirmed appropriate structures of the nanoparticles obtained. Spectroscopic properties of the products were examined on the basis of the measured excitation/emission spectra and luminescence decay curves. The synthesized samples showed orange-red luminescence, characteristic for Eu³⁺ ions. The reaction process was performed in required alkaline pH adjusted with the use of ethylenediaminetetraacetic acid (EDTA) and potassium hydroxide. The samples containing large amounts of Gd³⁺ dopant ions exhibited a tendency to form products with different morphologies.