Morphology-controllable synthesis, electronic structure and multicolor-tunable luminescence properties of multifunctional ScPO4 based nano/micro-phosphor
Morphology-controllable synthesis, electronic structure and multicolor-tunable luminescence properties of multifunctional ScPO4 based nano/micro-phosphor
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多功能ScPO 4 纳米/微米荧光粉的形貌可控合成、电子结构及多色可调发光性能
DOI：
10.1016/j.cej.2016.11.136
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发表时间：
2017-03-15
影响因子：
15.1
通讯作者：
Huang, Yan
中科院分区：
文献类型：
--
作者：
Han, Lili;Guo, Chao;Huang, Yan
在本文中，通过一种简便且可控的水热法，在不同的pH值下借助不同的有机添加剂，合成了具有多种形貌（如类球形、花状和正四面体微晶以及分散的纳米粒子）的材料ScPO₄·2H₂O和ScPO₄。扫描电子显微镜和透射电子显微镜结果表明，pH值、螯合剂、表面活性剂和溶剂组成对样品的形貌都有明显影响，尤其是pH值和螯合剂。根据密度泛函理论，计算出ScPO₄的带隙约为4.4 eV。将活性离子Tb³⁺和Yb³⁺引入基质后，ScPO₄:Tb³⁺,Yb³⁺在光致发光、阴极发光和上转换发光区域呈现出优异的多色光学性能，并基于能级示意图仔细研究了发光机制。所有结果表明，制备具有多种形貌和可调发射颜色的ScPO₄纳米/微晶的能力为系统地评估其合成路线以及充分探索其在多种彩色显示领域的应用提供了很好的机会。（C）2016爱思唯尔有限公司。保留所有权利。
In the paper, the materials ScPO4 center dot 2H(2)O and ScPO4 with multiform morphologies of spherical-like, flowerlike and regular tetrahedron micro-crystals as well as dispersive nano-particles, have been synthesized via a facile and controllable hydrothermal route assisted by the different organic additives under the different pH values. The scanning electron microscope and transmission electron microscopy results indicate that all of the pH value, the chelating agent, surfactant and solvent composition have obvious effects on the morphologies of samples, especially the pH value and the chelating agent. According to the density-functional theory, the band gap of ScPO4 is calculated as about 4.4 eV. After the active ions Tb3+ and Yb3+ are introduced into the host, ScPO4: Tb3(+,) Yb3+ presents the excellent multicolor optical properties in the photoluminescence, cathodoluminescence and up-conversion luminescence regions and based on the energy level schematic the luminescence mechanism is carefully investigated. All the results imply that the ability to generate ScPO4 nano/micro-crystals with the multiform morphologies and tunable emission colors provides a great opportunity for systematically evaluating their synthesis routes, as well as fully exploring their applications in many types of color display fields. (C) 2016 Elsevier B.V. All rights reserved.