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Europium-Doped Tellurite Glasses: The Eu2+ Emission in Tellurite, Adjusting Eu2+ and Eu3+ Emissions toward White Light Emission.
Elkholy, Hagar; Othman, Hosam; Hager, Ibrahim; Ibrahim, Medhat; de Ligny, Dominique.
Afiliação
  • Elkholy H; Physics Department, Faculty of Science, Menoufia University, Shebin El-Kom 32511, Egypt.
  • Othman H; Department Werkstoffwissenschaften, Lehrstuhl für Glas und Keramik, Universität Erlangen-Nürnberg, Martensstrasse5, D-91058 Erlangen, Germany.
  • Hager I; Physics Department, Faculty of Science, Menoufia University, Shebin El-Kom 32511, Egypt.
  • Ibrahim M; Physics Department, Faculty of Science, Menoufia University, Shebin El-Kom 32511, Egypt.
  • de Ligny D; Spectroscopy Department, National Research Centre, El-Buhooth Str., Dokki 12622, Giza, Egypt.
Materials (Basel) ; 12(24)2019 Dec 10.
Article em En | MEDLINE | ID: mdl-31835599
ABSTRACT
Europium-doped magnesium tellurite glasses were prepared using melt quenching techniques and attenuated total reflection (ATR) spectroscopy was used to study the glass structure. The glass transition temperature increased with increasing MgO content. Eu2+ and Eu3+ emissions were studied using photoluminescence spectroscopy (PL). The broad emission of Eu2+ ions centered at approximately 485 nm was found to decrease in intensity with increasing MgO content, while the Eu3+ emission was enhanced. The Eu3+ emission lay within the red orange range and its decay time was found to increase with increasing MgO content. Different excitation wavelengths were used to adjust Eu2+ to Eu3+ emissions to reach white light emission. The white light emission was obtained for the sample with the lowest MgO content under excitation in the near-UV range.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article