Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1595219 | Solid State Communications | 2007 | 4 Pages |
Abstract
The luminescent properties of GdTaO4 and GdTaO4:Eu3+ were investigated using synchrotron radiation VUV-UV source. Broad-band emissions peaked at 384 and 468 nm due to the TaO4 group and 6PJâ8S7/2 emission of Gd3+ at 316 nm under the UV excitation are found at 20 K, but quenched at room temperature. The excitation spectra of GdTaO4:Eu3+ monitoring the 5D0â7F2 emission of Eu3+ comprise interband excitation of host, the TaO4 group excitation, the CTS of Eu3+-O2â and Gd3+8S7/2â6IJ transitions. The energy-transfer processes among these centers are analyzed from the luminescence spectra. Under the VUV-UV excitation, GdTaO4:Eu3+ shows a series of emission lines ascribed to the 5DJâ7FJ transitions. The energy levels of Eu3+ in the GaTaO4 host were tentatively assigned according to the emission spectra.
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Materials Science
Materials Science (General)
Authors
Bo Liu, Kun Han, Xiaolin Liu, Mu Gu, Shiming Huang, Chen Ni, Zeming Qi, Guobin Zhang,