Effect of OH- on the upconversion luminescent efficiency of Y2O3:Yb3+, Er3+ nanostructures
Effect of OH- on the upconversion luminescent efficiency of Y2O3:Yb3+, Er3+ nanostructures
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DOI：
10.1016/j.ssc.2005.12.034
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发表时间：
2006-03-01
影响因子：
2.1
通讯作者：
Cui, Y
中科院分区：
文献类型：
--
作者：
De, GJ;Qin, WP;Cui, Y
在这项工作中，我们采用水热法合成了Yb3+和Er3+离子掺杂的立方Y2O3纳米结构，这是一种上转换发光材料。通过调节反应溶液的pH值，产物形成纳米管、纳米球和纳米片三种不同形状。粉末 X 射线衍射分析表明，所有三种纳米结构都是纯立方相，而电子显微镜测量证实了不同形态的形成。这些纳米结构在 978 nm 二极管激光器的激发下表现出强烈的可见光上转换发光。对样品从管状变为薄片的尺寸和形貌进行的 FTIR 和荧光衰减测量表明，OH-基团是发光效率变化的根源。具有高振动频率的 OH- 离子提供了一种有效的发光猝灭方法。然而，绿光和红光发射的相对强度和泵浦功率依赖性随着具有不同尺寸和形态的三种纳米结构而变化。 (c) 2006 Elsevier Ltd. 保留所有权利。
In this work, we used the ehydrothermal method to synthesize Yb3+ and Er3+ ions doped cubic Y2O3 nanostructures, which is an upconversion luminescent material. Three distinct shapes such as nanotubes, nanospheres and nanoflakes formed in the products by adjusting the pH value of reacting solution. Powder X-ray diffraction analyses indicate that all the three nanostructures were pure cubic phase, while electron microscopy measurements confirm the formation of different morphologies. These nanostructures exhibit strong visible upconversion luminescence under the excitation of a 978-nm diode laser. The FTIR and fluorescent decay measurements at the size and morphology of sample changed from tubes to flakes indicate that the OH- group is the origin of luminescent efficiency change. OH- ions with high vibration frequency provide an efficient means to quench the luminescence. However, the relative intensity and pump-power dependence of the green and red emissions varies with the three nanostructures possessing different size and morphology. (c) 2006 Elsevier Ltd. All rights reserved.