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Preparation and Upconversion Emission Investigation of the YVO4: Yb3+/Tb3+/Eu3+ Nanomaterials and Their Coupling with the Au Nanoparticles
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2020-07-20 , DOI: 10.1002/crat.202000001 Tingting Chen 1 , Ke Li 1 , Huibing Mao 1 , Ye Chen 1 , Jiqing Wang 1
Crystal Research and Technology ( IF 1.5 ) Pub Date : 2020-07-20 , DOI: 10.1002/crat.202000001 Tingting Chen 1 , Ke Li 1 , Huibing Mao 1 , Ye Chen 1 , Jiqing Wang 1
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The YVO4 nanomaterials doped with the Yb3+/Tb3+/Eu3+ ions and their mixture with the Au nanoparticles are synthetized with a classical sol‐gel method. With the excitation of a 975 nm laser, both the doped YVO4 sample and the corresponding mixture sample have a series of upconversion emission peaks of Eu3+ and Tb3+, which includes the 5D0→7Fj transitions of the Eu3+ ions and the 5D4→7Fj transitions of the Tb3+ ions. The slope values of the log‐log plots of laser power dependence for the upconversion emission intensities range from 1 to 2, which confirms that the upconversion process is a two‐photon process. With the plasmon coupling, the slope value for the power dependence of the magnetic dipole transition 5D0→7F1 of the Eu3+ ions decreases from 1.4 to 1.1, while it increases for other electric dipole transitions. Because of the plasmon coupling, the emission peak of the Eu3+ at about 2.095 eV decreases significantly and almost cannot be observed. Meanwhile, the emission peak of the Tb3+ at about 2.113 eV increases significantly and becomes the main emission peak in the yellow band. This phenomenon confirms that there is different mechanism for the magnetic and electric dipole emission with the plasmon coupling.
中文翻译：
YVO4：Yb3 + / Tb3 + / Eu3 +纳米材料的制备及上转换发射研究及其与金纳米颗粒的偶联
用经典的溶胶-凝胶法合成了掺有Yb 3+ / Tb 3+ / Eu 3+离子的YVO 4纳米材料及其与Au纳米颗粒的混合物。在975 nm激光的激发下，掺杂的YVO 4样品和相应的混合物样品都具有一系列Eu 3+和Tb 3+上转换发射峰，其中包括Eu的5 D 0 → 7 F j跃迁。3+离子和Tb 3+的5 D 4 → 7 F j跃迁离子。上转换发射强度的激光功率相关性的对数-对数图的斜率值范围为1到2，这证实上转换过程是一个双光子过程。通过等离子体激元耦合，Eu 3+离子的磁偶极跃迁5 D 0 → 7 F 1的功率相关性的斜率值从1.4减小到1.1，而对于其他电偶极跃迁则增加。由于等离激元耦合，Eu 3+的发射峰在约2.095 eV处显着下降，几乎无法观察到。同时，Tb 3+的发射峰在约2.113 eV处，其显着增加，并成为黄色波段的主要发射峰。这种现象证实了通过等离激元耦合产生的磁偶极子和电偶极子发射机制不同。
更新日期：2020-08-14
中文翻译：
YVO4：Yb3 + / Tb3 + / Eu3 +纳米材料的制备及上转换发射研究及其与金纳米颗粒的偶联
用经典的溶胶-凝胶法合成了掺有Yb 3+ / Tb 3+ / Eu 3+离子的YVO 4纳米材料及其与Au纳米颗粒的混合物。在975 nm激光的激发下，掺杂的YVO 4样品和相应的混合物样品都具有一系列Eu 3+和Tb 3+上转换发射峰，其中包括Eu的5 D 0 → 7 F j跃迁。3+离子和Tb 3+的5 D 4 → 7 F j跃迁离子。上转换发射强度的激光功率相关性的对数-对数图的斜率值范围为1到2，这证实上转换过程是一个双光子过程。通过等离子体激元耦合，Eu 3+离子的磁偶极跃迁5 D 0 → 7 F 1的功率相关性的斜率值从1.4减小到1.1，而对于其他电偶极跃迁则增加。由于等离激元耦合，Eu 3+的发射峰在约2.095 eV处显着下降，几乎无法观察到。同时，Tb 3+的发射峰在约2.113 eV处，其显着增加，并成为黄色波段的主要发射峰。这种现象证实了通过等离激元耦合产生的磁偶极子和电偶极子发射机制不同。
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