Comparative study of the luminescence of Y₃Al₅O₁₂ nanoceramics and single crystals under excitation by synchrotron radiation

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• 作者：Yu. Zorenko ; T. Voznyak ; V.V. Gorbenko ; A. Doroshenko ; A. Tolmachev ; R. Yavetskiy ; I. Petrusha ; V. Turkevich
• 关键词：Luminescence ; Y3Al5O12 garnet ; Nanoceramics ; Single crystals ; Antisite defects ; Oxygen vacancies
• 刊名：Optical Materials
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：35
• 期：12
• 页码：2049-2052
• 全文大小：1049 K

文摘

Comparative investigation of the luminescent properties of Y₃Al₅O₁₂ (YAG) nanoceramics with the properties of single crystals counterpart is performed under excitation by synchrotron radiation in the exciton range of YAG host. Analysis of the luminescent properties of such different crystalline forms of YAG allows us to conclude that the behavior of YAG nanoceramics is close to the properties of single crystal analogue with large content of Y_Al antisite defects (ADs). We also have found that the relative intensity of F⁺-AD coupled centers is significantly higher in YAG nanoceramics than that for single crystal counterpart. This presupposes the strong coupling of the antisite defects and oxygen vacancy-related centers in YAG nanoceramics, mainly at the boundaries of grains.