Blue-green and red photoluminescence in CaTiO₃:Sm

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• 作者：Alberthmeiry T. de Figueiredo ; Valé ; ria M. Longo ; Sé ; rgio de Lazaro ; Valmor R. Mastelaro ; Fá ; bio S. De Vicente ; Antô ; nio C. Hern ; es ; Má ; ximo Siu Li ; José ; A. Varela ; Elson Lon
• 关键词：Luminescence ; Order– ; disorder ; Optical materials ; CT ; Sm
• 刊名：Journal of Luminescence
• 出版年：2007
• 期刊代码：54_00222313
• 类别：ch
• 出版时间：October 2007
• 卷：126
• 期：2
• 页码：403-407
• 文件大小：420 K

摘要

Blue-green and red photoluminescence (PL) emission in structurally disordered CaTiO₃:Sm (CT:Sm) powders was observed at room temperature with laser excitation at 350.7 nm. The perovskite-like titanate CT:Sm powders prepared by a soft chemical processing at different temperatures of annealing were structurally characterized by X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES). The results indicate that the generation of the broad PL band is related to order–disorder degree in the perovskite-like structure.