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Title: Ag{sub 2}O dependent up-conversion luminescence properties in Tm{sup 3+}/Er{sup 3+}/Yb{sup 3+} co-doped oxyfluorogermanate glasses

Up-conversion (UC) luminescence properties of Ag/Tm{sup 3+}/Er{sup 3+}/Yb{sup 3+} co-doped oxyfluorogermanate glasses have been studied to assess the effective role of silver nanoparticles as a sensitizer for Tm{sup 3+} and Er{sup 3+} ions. The X-ray diffraction patterns obtained in this work do not reveal any crystalline phase in the glass. However, the absorption spectra reveal that surface plasmons resonance band of Ag undergoes a distinct split with two maxima and a very broad absorption peak with a background that extends toward the near infrared (NIR) with the increasing of Ag{sub 2}O added concentration. Transmission electron microscope images confirm that silver nanoparticles have been precipitated from matrix glasses and show their distribution, size, and shapes. In addition, changes in UC luminescence intensity of four emission bands 476, 524, 546, and 658 nm corresponding to {sup 1}G{sub 4} → {sup 3}H{sub 6} (Tm{sup 3+}), ({sup 2}H{sub 11/2}, {sup 4}S{sub 3/2}) → {sup 4}I{sub 15/2} (Er{sup 3+}), and {sup 4}F{sub 9/2} → {sup 4}I{sub 15/2} (Er{sup 3+}) transitions, respectively, as a function of silver addition to the base composition have been measured under 980 nm excitation. It is confirmed that Ag{sub 2}O added concentration plays an important role in increasing the UC luminescence intensity; however,more » further increase in Ag{sub 2}O added concentration reduces the intensity.« less
Authors:
 [1] ; ; ;  [2]
  1. Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500 (China)
  2. Key Laboratory of Advanced Materials in Rare and Precious and Non-ferrous Metals, Ministry of Education, Key Laboratory of Advanced Materials of Yunnan Province, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093 (China)
Publication Date:
OSTI Identifier:
22277997
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; CONCENTRATION RATIO; DOPED MATERIALS; ERBIUM IONS; EXCITATION; GLASS; LUMINESCENCE; NANOSTRUCTURES; PARTICLES; PLASMONS; PRECIPITATION; SILVER; SILVER ADDITIONS; SILVER OXIDES; THULIUM IONS; TRANSMISSION ELECTRON MICROSCOPY; TRITIUM; URANIUM CARBIDES; X-RAY DIFFRACTION; YTTERBIUM IONS