Emission Enhancement and Color Tuning for GdVO 4 :Ln 3+ (Ln = Dy, Eu) by Surface Modification at Single Wavelength Excitation

作者：Yan Song, Baiqi Shao, Yang Feng, Wei Lü, Jiansheng Huo, Shuang Zhao, Man Liu, Guixia Liu, Hongpeng You · 发表于：Inorganic Chemistry · 年份：2016 · DOI：10.1021/acs.inorgchem.6b02125 · 被引用次数：42 · 研究领域：Luminescence Properties of Advanced Materials、Lanthanide and Transition Metal Complexes、Glass properties and applications

The surface modification can realize systematically the emission enhancement of GdVO 4:Ln 3+ (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 Eu 3+ and Dy 3+ ions via the energy transfer besides the VO 4 3– –Eu 3+ /Dy 3+ process. More importantly, under a single wavelength excitation, the emission color can be effectively tuned by manipulating the doping ratio of the Eu 3+ ions in the internal crystal lattice and the Tb 3+ ions in the external surface ligands, simultaneously. And further, multicolor emissions are obtained under single wavelength excitation due to the high overlapping between the VO 4 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.