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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

High red emission intensity of Eu:Y2O3 films grown on Si(100)/Si (111) by electron beam evaporation

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Author(s):
Rivera, V. A. G. [1] ; Ferri, F. A. [1] ; Clabel H, J. L. [2] ; Pereira-da-Silva, M. A. [3, 1] ; Nunes, L. A. O. [1] ; Li, M. Siu [1] ; Marega, Jr., E. [1]
Total Authors: 7
Affiliation:
[1] Inst Fis Sao Carlos USP, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Fis, Grp Mat & Disposit, BR-13565905 Sao Carlos, SP - Brazil
[3] UNICEP, Ctr Univ Cent Paulista, BR-13563470 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Luminescence; v. 148, p. 186-191, APR 2014.
Web of Science Citations: 5
Abstract

High red photoluminescence emission has been obtained at room temperature in Eu3+-doped yttrium oxide thin films following thermal treatment. Films with different thicknesses were deposited on Si (1 0 0) and Si(1 1 1) substrates via electron beam evaporation in a vacuum environment. The films were subsequently annealed in an oxygen atmosphere for 5 h at 900 degrees C. The structural and optical properties of the films were measured before and after annealing. An improvement in the emission intensity was observed as a result of the thermal treatment under a controlled atmosphere. This observation is related to the reduction of non radiative processes, as verified by the enhancement of the D-5(0)-> F-7(2) lifetime values. This improvement in the emission intensity was also analyzed in terms of electric and magnetic dipole transitions (D-5(0)-> F-7(2) and D-5(0)-> F-7(1) level transitions, respectively). Both transitions are directly related to the site symmetry and, consequently, to the crystalline structure of the films deposited on the Si(1 0 0)/Si(1 1 1) substrates. (C) 2013 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/21293-0 - Planar waveguides for optical telecommunications from plasmonic
Grantee:Victor Anthony Garcia Rivera
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 09/08978-4 - Planar Waveguide for Telecommunications from Plasmons
Grantee:Victor Anthony Garcia Rivera
Support Opportunities: Scholarships in Brazil - Post-Doctoral