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Photoluminescence properties of the ZnO-CdO-TeO2 system doped with the Tband Yb ions |
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| Authors: | C. Ruvalcaba-Cornejo,Ma. Elena Zayas,R. Palomino-Merino,J.E. Espinosa,J. Martí nez-Juá rez,S.A. Tomá s |
| Affiliation: | a Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Mexico b Universidad de Sonora, Centro de Investigación en Física, Rosales y Luis Encinas s/n, colonia Centro 83000, Hermosillo, Sonora, Mexico c Departamento de C. Químico-Biológicas y Agropecuarias, Universidad de Sonora, Unidad Regional Sur, Navojoa, Sonora, Mexico d Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla, Mexico e Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Mexico f Departamento de Dispositivos Semiconductores, Benemérita Universidad Autónoma de Puebla, 14 Av. Sur y Av. San Claudio, Col. San Manuel, Puebla, Mexico g Departamento de Física, Centro de Investigación y de Estudios Avanzados, P.O. Box 14-740, México 07360 D.F., Mexico |
| Abstract: | ZnO-CdO-TeO2 was employed as a host of Tb3+ and Yb3+ ions. The matrix doped with Tb3+ presents a crystalline/amorphous structure, while the same matrix shows an amorphous structure when it is doped with Yb3+. Optical absorption spectra, measured by using photoacoustic (PA) spectroscopy, allowed to determine the band gap, which is localized in the range 3.47-3.60 eV. Both kinds of ions Tb3+ and Yb3+ in the ZnO-CdO-TeO2 matrix show emissions that are characteristic of such ions. For Tb3+ the signals were allocated in 548, 586, 622 nm, respectively, while for Yb3+ only one signal was registered at 1000 nm. |
| Keywords: | 61.43.Fs 78.20.&minus e 78.55.&minus m 78.30.Ly |
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