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1533251 
Journal Article 
Room temperature photoluminescence in crystalline/amorphous Er-doped Cd2V2O7 
Cid-Garcia, A; Lozada-Morales, R; Lopez-Calzada, G; Zayas, MaE; Zelaya Angel, O; Carmona-Rodriguez, J; Rodriguez-Melgarejo, F; Rubio-Rosas, E; Jimenez-Sandoval, S; Tomas, SA 
2012 
Yes 
Journal of Luminescence
ISSN: 0022-2313 
132 
6 
1511-1514 
WOS:000302662700033 
Er3+ ions were introduced into a new type of oxide matrixes
prepared with different proportions of CdO and V2O5. The source of Er3+ employed was Er(NO3)(3)
center dot 5H(2)O, which yielded an Er3+ concentration of similar to 1 at%. Depending on the
reactants proportions, the samples resulted in crystalline or amorphous structures. X-ray
diffraction indicated that the crystalline samples were constituted by polycrystalline Cd2V2O7,
in agreement with Raman spectroscopy measurements. Depending on the proportions of the component
oxides, the band gap changed in the 2.49-1.77 eV energy range, as determined through
photoacoustic spectroscopy. From photoluminescence spectra, the following electronic transitions
of Er3+ were observed in both types of samples: {H-2(11/2), S-4(3/2), F-4(9/2) I-4(9/2)} -> I-4
(5/2) and S-4(3/2) -> I-4(13/2). In the case of crystalline samples manifolds, originating from
the Stark effect, were measured for the {H-2(11/2), S-4(3/2), F-4(9/2)} -> I-4(15/2) and S-4(3/2)
-> I-4(13/2) transitions. (C) 2012 Elsevier B.V. All rights reserved. 
Photoluminescence; Crystalline; Amorphous