Repozytorium publikacji - Politechnika Gdańska

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.

Autorzy

• Tomasz Lewandowski link otwiera się w nowej karcie ,
• Cezary Seweryński link otwiera się w nowej karcie ,
• Michalina Walas link otwiera się w nowej karcie ,
• dr hab. inż. Marcin Stanisław Łapiński link otwiera się w nowej karcie ,
• Anna Synak,
• prof. dr hab. inż. Wojciech Sadowski link otwiera się w nowej karcie ,
• prof. dr hab. inż. Barbara Kościelska link otwiera się w nowej karcie