Preparation and Upconversion Luminescence of Three-Dimensionally Ordered Macroporous ZrO2: Er3+, Yb3+

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• 作者：Xuesong Qu ; Hongwei Song ; Xue Bai ; Guohui Pan ; Biao Dong ; Haifeng Zhao ; Fang Wang ; Ruifei Qin
• 刊名：Inorganic Chemistry
• 出版年：2008
• 出版时间：October 20, 2008
• 年：2008
• 卷：47
• 期：20
• 页码：9654-9659
• 全文大小：295K
• 年卷期：v.47,no.20(October 20, 2008)
• ISSN：1520-510X

文摘

The three-dimensionally ordered macroporous (3DOM) ZrO₂: Er³⁺, Yb³⁺ materials were successfully synthesized by the sol−gel method combined with a polystyrene latex sphere templating technique, and their morphologies, surface physicochemical properties, and upconversion photoluminescence (UC-PL) properties were studied. The results indicate that the materials exhibited both porosity and strong UC-PL under the excitation of a 978 nm diode laser. In comparison with the nonporous samples, the relative intensity of the red (⁴F_9/2−⁴I_15/2) to the green (⁴S_3/2/²H_11/2−⁴I_15/2) emission decreased visibly because of the decreased nonradiative relaxation in the 3DOM materials. It was also observed that the relative intensity of the green emission to the red emission increased significantly with the increasing excitation power. An indirect three-photon populating process occurred for the green emission as the excitation power and Yb³⁺ concentration was high enough.