YW2O6（OH）3：Tb^3＋ green phosphors were synthesized at different pH values via a facile hydrothermal method. The structure and optical properties of as-synthesized samples were studied by X-ray diffractometer （XRD...YW2O6（OH）3：Tb^3＋ green phosphors were synthesized at different pH values via a facile hydrothermal method. The structure and optical properties of as-synthesized samples were studied by X-ray diffractometer （XRD）, scanning electron microscopy （SEM）, photolumi-nescence spectra and luminescence decay curve. The results showed that pure monoclinic YW2O6（OH）3：Tb^3＋ green phosphors could be ob-tained at pH 2-5. Uniform spherical micro-phosphors of ~5 μm in diameter with narrow size distribution could be prepared at pH 5. pH value had dramatic influence on morphologies, which could be ascribed to the various spatial configurations of different poly-tungstates existing at different pH values. The emission spectra under 261 nm excitation exhibited dominant green emission at 546 nm. The green emission inten-sity reached the maximum value at pH 5 due to the high packing density of the obtained phosphor.展开更多
基金supported by the National Natural Science Foundation of China (51002069)College Students' Scitech and Culture Innovation Foundation in Liaocheng University (SRT10009CL2, SRT10016CL2)
文摘YW2O6（OH）3：Tb^3＋ green phosphors were synthesized at different pH values via a facile hydrothermal method. The structure and optical properties of as-synthesized samples were studied by X-ray diffractometer （XRD）, scanning electron microscopy （SEM）, photolumi-nescence spectra and luminescence decay curve. The results showed that pure monoclinic YW2O6（OH）3：Tb^3＋ green phosphors could be ob-tained at pH 2-5. Uniform spherical micro-phosphors of ~5 μm in diameter with narrow size distribution could be prepared at pH 5. pH value had dramatic influence on morphologies, which could be ascribed to the various spatial configurations of different poly-tungstates existing at different pH values. The emission spectra under 261 nm excitation exhibited dominant green emission at 546 nm. The green emission inten-sity reached the maximum value at pH 5 due to the high packing density of the obtained phosphor.
