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Title: Incorporation of Er{sup 3+} ions into an amorphous matrix of Cd{sub 2}V{sub 2}O{sub 7} containing crystalline CdO nanoparticles

Er{sup 3+} ions have been introduced into a matrix of Cd{sub 2}V{sub 2}O{sub 7} using a conventional melt-quenching method. X-ray diffraction results indicate that a material constituted of CdO nanocrystals of ∼40 nm embedded within the amorphous Cd{sub 2}V{sub 2}O{sub 7} matrix was fabricated. The presence of such nanocrystals was confirmed by transmission electron microscopy. Raman spectroscopy measurements confirm that the amorphous matrix is composed by Cd{sub 2}V{sub 2}O{sub 7}. The band gap obtained by optical absorption is 2.84 eV. From the photoluminescence spectrum the electronic transitions such as ({sup 2}H{sub 11/2}, {sup 4}S{sub 3/2}, {sup 4}F{sub 9/2}, {sup 4}I{sub 9/2}) → {sup 4}I{sub 15/2} and {sup 4}S{sub 3/2} → {sup 4}I{sub 13/2} corresponding to Er{sup 3+} were observed. Thermally activated transport was observed by dark conductivity measurements taken from room temperature to 450 K. The morphology and chemical composition of the sample were determined by scanning electron microscopy and energy dispersive spectroscopy, respectively.
Authors:
 [1] ; ;  [1] ;  [2] ;  [3] ;  [2] ;
  1. Benemérita Universidad Autónoma de Puebla, Postgrado en Física Aplicada, Facultad de Ciencias Físico-Matemáticas, Av. 14 sur y Av. San Claudio, Col. San Manuel, Puebla (Mexico)
  2. Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Departamento de Física, P.O. Box 14-740, México D. F. 07360 (Mexico)
  3. Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Querétaro, Apartado Postal 1-798, Querétaro, Qro 76001 (Mexico)
Publication Date:
OSTI Identifier:
22475854
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 68; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; CADMIUM COMPOUNDS; CADMIUM OXIDES; ERBIUM IONS; NANOPARTICLES; NANOSTRUCTURES; PHOTOLUMINESCENCE; RAMAN SPECTROSCOPY; SCANNING ELECTRON MICROSCOPY; SPECTRA; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; VANADATES; X-RAY DIFFRACTION