An empirical energy level scheme to predict photoluminescent and long persistent luminescent properties of Ln³⁺ doped NaCa₂GaGe₅O₁₄ materials

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• 作者：Zehua Zou ; Jiajia Li ; Hui Zhou ; Jiachi Zhang ; ^{zhangjch@lzu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Zhipeng Ci ; ^{cizhp@lzu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yuhua Wang
• 关键词：Photoluminescence ; Long persistent luminescence ; NaCa2GaGe5O14
• 刊名：Journal of Luminescence
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：179
• 期：Complete
• 页码：629-632
• 全文大小：1103 K

文摘

An energy level scheme of the NaCa₂GaGe₅O₁₄:Ln³⁺/Ln²⁺ phosphors has been constructed by collecting spectroscopy data. The energy level positions of Ln²⁺/Ln³⁺ can be used to gain insight into the photoluminescence and long persistent luminescence properties of the NaCa₂GaGe₅O₁₄:Ln³⁺/Ln²⁺ phosphors and the ability of Ln³⁺ codopants as foreign electron traps. All the theoretical predictions have been confirmed by the experimental results. For this case, this energy level scheme is reliable and can be used as a transferable empirical tool to study the luminescent properties of known phosphors, and even guide the further development of new phosphors.