Blue luminescence in the WO₃P₂O₅ZnO glass system

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• 作者：Thomas Scheike¹ ; Hiroyo Segawa ; ^{segawa.hiroyo@nims.go.jp} ; Satoru Inoue ; Yoshiki Wada
• 关键词：WO3P2O5ZnO glasses ; Luminescence ; Blue emission
• 刊名：Optical Materials
• 出版年：2012
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：June, 2012
• 卷：34
• 期：8
• 页码：1488-1492
• 文件大小：622 K

摘要

Luminescence in WO₃P₂O₅ZnO glasses was measured and its origin was investigated. With XRD measurements, the amorphous phase of the glasses was determined to exclude a crystalline-phase region as the source of luminescence. A blue emission by 320 nm excitation was observed, similar to that in ZnWO₄ crystals. The decomposition of the emission spectra into three bands and the Stokes shift were close to the results for ZnWO₄ crystals. The laser spectroscopy revealed decay behavior similar to that for ZnWO₄ crystals. Raman spectroscopy on the glasses showed the presence of WO₆ groups in the glass. We conclude that the origin of the luminescence of the glasses is the same as that of ZnWO₄. The luminescence in the glass is an intrinsic feature of the WO₆ group. It results from the electronic excitation of O(2p) to W(5d) energy levels and the following decay in the WO₆ groups of the glass.