Three-Dimensionally Ordered Macroporous ZrO2:Eu3+: Photonic Band Effect and Local Environments

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• 作者：Xuesong Qu ; Hongwei Song ; Guohui Pan ; Xue Bai ; Biao Dong ; Haifeng Zhao ; Qilin Dai ; Hui Zhang ; Ruifei Qin ; Shaozhe Lu
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：April 16, 2009
• 年：2009
• 卷：113
• 期：15
• 页码：5906-5911
• 全文大小：300K
• 年卷期：v.113,no.15(April 16, 2009)
• ISSN：1932-7455

文摘

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 ⁵D₀-⁷F₁ transition peaking at 590 nm was observed, which was in good agreement with the photonic band gap calculated (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 ⁵D₀-⁷F_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.