Room temperature photoluminescence in crystalline/amorphous Er-doped Cd<sub>2sub>V<sub>2sub>O<sub>7sub>
- 作者：A. Cid-Garcí ; a<sup>asup> ; R. Lozada-Morales<sup>asup><sup> ; sup><sup>rlozada@fcfm.buap.mxsup> ; G. Ló ; pez-Calzada<sup>csup> ; Ma. E. Zayas<sup>dsup> ; O. Zelaya Angel<sup>esup> ; J. Carmona-Rodriguez<sup>csup><sup> ; sup><sup>fsup> ; F. Rodriguez-Melgarejo<sup>csup> ; E. Rubio-Rosas<sup>bsup> ; S. Jimé ; nez-Sandoval<sup>csup> ; S.A. Tomá ; s<sup>esup>
- 关键词：Photoluminescence ; Crystalline ; Amorphous
- 刊名：Journal of Luminescence
- 出版年：2012
- 期刊代码：54_00222313
- 类别：ch
- 出版时间：June, 2012
- 卷：132
- 期：6
- 页码：1511-1514
- 文件大小：446 K
摘要
Er<sup>3+sup> ions were introduced into a new type of oxide matrixes prepared with different proportions of CdO and V<sub>2sub>O<sub>5sub>. The source of Er<sup>3+sup> employed was Er(NO<sub>3sub>)<sub>3sub>路5H<sub>2sub>O, which yielded an Er<sup>3+sup> concentration of 鈭? 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 Cd<sub>2sub>V<sub>2sub>O<sub>7sub>, 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 Er<sup>3+sup> were observed in both types of samples: {<sup>2sup>H<sub>11/2sub>, <sup>4sup>S<sub>3/2sub>, <sup>4sup>F<sub>9/2sub>, <sup>4sup>I<sub>9/2sub>}鈫?sup>4sup>I<sub>15/2sub> and <sup>4sup>S<sub>3/2sub>鈫?sup>4sup>I<sub>13/2sub>. In the case of crystalline samples manifolds, originating from the Stark effect, were measured for the {<sup>2sup>H<sub>11/2sub>, <sup>4sup>S<sub>3/2sub>, <sup>4sup>F<sub>9/2sub>}鈫?sup>4sup>I<sub>15/2sub> and <sup>4sup>S<sub>3/2sub>鈫?sup>4sup>I<sub>13/2sub> transitions.