Electronic properties and europium ion photoluminescence behaviors in Sr₂CeO₄ phosphor

详细信息    查看全文

• 作者：Jie Li ; Li Wang ; Hefeng Zhou ; Xuguang Liu ; Bingshe Xu
• 关键词：Electronic structures ; Photoluminescence ; Sr₂CeO₄ phosphor ; Energy transfer
• 刊名：Journal of Alloys and Compounds
• 出版年：2010
• 出版时间：17 September 2010
• 年：2010
• 卷：506
• 期：2
• 页码：950-955
• 全文大小：577 K

文摘

Sr₂CeO₄, pure and doped with Eu³⁺ ions of different concentrations, were synthesized by polyacrylamide gel method. First principles were applied to calculate the electronic structures and band gap of Sr₂CeO₄. The results show that a broad emission band originating from Sr₂CeO₄ host and Eu³⁺ emission lines in blue, green, and red regions coexist. The increase in Eu³⁺ concentration results in the luminescence intensity redistribution between the Sr₂CeO₄ host and the doping ion. The energy transfer model clarifies the possible mechanisms of energy transfer from Sr₂CeO₄ host to Eu³⁺ in Sr₂CeO₄:Eu³⁺ phosphor.