光致发光
荧光粉
X射线光电子能谱
材料科学
无定形固体
发光
分析化学(期刊)
兴奋剂
色温
激发态
发射光谱
光谱学
还原气氛
化学
光电子学
化学工程
谱线
结晶学
冶金
量子力学
天文
色谱法
物理
工程类
核物理学
作者
Tomasz Lewandowski,Cezary Seweryński,Michalina Walas,Marcin Łapiński,Anna Synak,W. Sadowski,Barbara Kościelska
标识
DOI:10.1016/j.optmat.2018.03.031
摘要
Tellurite glass systems of 73TeO2-4BaO-3Bi2O3-1Ag:xEu2O3-(2-x)Dy2O3 (where x = 0.5, 1, 1.5, 2 in molar ratio) composition have been successfully synthesized. In order to acquire Ag nanoparticles, materials have been heat treated at 350 °C in the air atmosphere. Structural properties of obtained samples were evaluated with various techniques. X-Ray Diffraction (XRD) measurements indicated that obtained materials are amorphous in nature. UV–vis results presented transitions characteristic to Dy3+ and Eu3+ ions. Additionally, X-Ray Photoelectron Spectroscopy (XPS) analysis indicated the presence of silver in metallic form. Photoluminescence measurements shown influence of Ag nanoparticles on emission characteristics. Simultaneous emission of Dy3+ and Eu3+ has been observed when samples were excited with λexc = 390 nm. Change of the emission color induced by heat treatment has been observed and described in case of x = 1 glass series. According to CIE results emission color changes as Eu/Dy ratio and heat treatment time are changed. Emission shifts from reddish-orange to yellowish white color. Obtained photoluminescence results confirm that synthesized materials are good candidates for color tunable phosphors.
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