Emission Enhancement and Color Tuning for GdVO4:Ln3+ (Ln = Dy, Eu) by Surface Modification at Single Wavelength Excitation

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• 作者：Yan Song ; Baiqi Shao ; Yang Feng ; Wei Lü ; Jiansheng Huo ; Shuang Zhao ; Man Liu ; Guixia Liu ; Hongpeng You
• 刊名：Inorganic Chemistry
• 出版年：2017
• 出版时间：January 3, 2017
• 年：2017
• 卷：56
• 期：1
• 页码：282-291
• 全文大小：652K
• ISSN：1520-510X

文摘

The surface modification can realize systematically the emission enhancement of GdVO₄:Ln³⁺ (Ln = Dy, Eu) microstructures and multicolor emission at single component. The structure, morphology, composition, and the surface ligands modification of as-prepared samples were studied in detail. It is found that the surface-modified ligands can act as sensitizer to improve the emission of the Eu³⁺ and Dy³⁺ ions via the energy transfer besides the VO₄^3––Eu³⁺/Dy³⁺ process. More importantly, under a single wavelength excitation, the emission color can be effectively tuned by manipulating the doping ratio of the Eu³⁺ ions in the internal crystal lattice and the Tb³⁺ ions in the external surface ligands, simultaneously. And further, multicolor emissions are obtained under single wavelength excitation due to the high overlapping between the VO₄^3– absorption and the π–π* electron transition of the ligands. These findings may open new avenues to design and develop new highly efficient luminescent materials.