Investigation of photoluminescence properties of Eu³⁺-doped GdAlO₃ and LaAlO₃ by site-selective laser spectroscopy

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• 作者：Xiaorui Dong^a ; ^b ; Zuoling Fu^a ; ^b ; ^{zlfu@jlu.edu.cn} ; Yingning Yu^c ; Shuaibing Li^a ; ^b ; Zhenwen Dai^a ; ^b ; ^{dai@jlu.edu.cn}
• 关键词：Luminescence ; Site-selection ; Eu3+ ; GdAlO3 ; LaAlO3
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：1 May, 2012
• 卷：74
• 期：Complete
• 页码：140-142
• 文件大小：355 K

摘要

Photoluminescence properties of Eu³⁺-doped GdAlO₃ and LaAlO₃ phosphors prepared by sol-gel method have been investigated by the site-selective laser spectroscopy along with the decay time measurements at room temperature. The site-selective excitation spectra showed one ⁷ F₀ 鈫?#xA0;⁵D₀ transition line in GdAlO₃:Eu³⁺ and three ⁷ F₀ 鈫?#xA0;⁵D₀ transition lines in LaAlO₃:Eu³⁺, indicating that there was only one crystallographic site for Eu³⁺ in GdAlO₃ and three crystallographic sites for Eu³⁺ in LaAlO₃. The result of LaAlO₃ was not in agreement with its crystal structure. The stark energy levels for Eu³⁺ at different sites were characterized and discussed by site-selective emission spectra arose from ⁵D₀ level of Eu³⁺.