Three-Dimensionally Ordered Macroporous ZrO2:Eu3+: Photonic Band Effect and Local Environments
Three-Dimensionally Ordered Macroporous ZrO2:Eu3+: Photonic Band Effect and Local Environments
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三维有序大孔 ZrO2:Eu3：光子带效应和局部环境
DOI：
10.1021/jp8075063
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发表时间：
2009-04-16
影响因子：
3.7
通讯作者：
Lu, Shaozhe
中科院分区：
文献类型：
--
作者：
Qu, Xuesong;Song, Hongwei;Lu, Shaozhe
以聚苯乙烯（PS）胶体晶体为模板，采用溶胶-凝胶法制备了三维有序大孔（3DOM）ZrO 2：Eu 3+反蛋白石材料。研究了它们的晶体结构、形貌、光致发光（PL）特性以及光子阻带对Eu 3+离子自发辐射的影响，并与无孔样品进行了比较。在3DOM ZrO 2中：Eu ~（3+）对5D（0）-F-7（1）跃迁峰在590 nm处有明显的抑制作用，这与计算的光子带隙（与586 nm相似）吻合得很好。在研磨3D ZrO 2：Eu 3+反蛋白石材料之后，由于光子带隙的消失，对发射的抑制恢复。在3DOM ZrO 2：Eu 3+中，D-5（0）-F-7（J）的发光寿命与发射波长有很强的依赖性，这主要归因于不同Eu 3+中心的出现。在3DOM ZrO 2：Eu 3+，三个对称网站的Eu 3+被确定的网站选择性激发，不同于无孔样品，其中只有一个网站被确定。
Three-dimensionally ordered macroporous (3DOM) ZrO2:Eu3+ inverse opal materials prepared by polystyrene (PS) colloidal crystal templating, using the sol-gel method, were successfully fabricated. Their crystal structure, morphology, and photoluminescence (PL) properties and the effect of the photonic stop-band on the spontaneous emission of Eu3+ ions were studied and compared with those of the nonporous sample. In the 3DOM ZrO2: Eu3+, significant suppression for the 5D(0)-F-7(1) transition peaking at 590 nm was observed, which was in good agreement with the photonic band gap calculated (similar to 586 nm). After grinding the 3D ZrO2:Eu3+ inverse opal material, the suppression of emission was restored due to the disappearance of the photonic band gap. In the 3DOM ZrO2:Eu3+, the luminescent lifetime of D-5(0)-F-7(J) depended strongly on emission wavelengths, which was mainly attributed to the appearance of different Eu3+ centers. In the 3DOM ZrO2:Eu3+, three symmetry sites for Eu3+ were identified by site-selective excitation, differing from the nonporous sample, in which only one site was identified.