XANES, EXAFS and photoluminescence investigations on the amorphous Eu:HfO₂

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• 作者：Aditya Sharma^a ; Mayora Varshney^a ; Hyun-Joon Shin^b ; ^{shj001@postech.ac.kr} ; KeunHwa Chae^a ; ^{khchae@kist.re.kr} ; Sung Ok Won^a ; ^{sowon@kist.re.kr}
• 关键词：XRD ; XANES ; EXAFS ; HfO2 ; Photoluminescence
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：173
• 期：Complete
• 页码：549-555
• 全文大小：1224 K
• 卷排序：173

文摘

Eu:HfO2 samples were synthesized using co-precipitation method. XRD, XANES, EXAFS and photoluminescence measurements were performed. Eu3 + ions were dominantly present in Eu doped samples with marginal Eu2 + ions. Hf L1-edge XANES/EXAFS and O K-edge XANES confirmed local monoclinic structure in amorphous samples. High emission characteristics are achieved by Eu insertion in the weakly emitting HfO2.