• structure and photoluminescent properties of b3+-doped (y0.9dy0.1)inge2o7 phosphor

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 769
    • تعداد پرسش و پاسخ ها: 0
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     a color-tunable, near-white-light-emitting, b3+-doped (y0.9dy0.1)inge2o7 phosphor was synthesized using a solid-state reaction, and its structure and luminescent properties were determined. x-ray powder diffraction patterns showed that all of the diffraction peaks can be attributed to the monoclinic yinge2o7 crystal structure for b3+ ion concentration up to 5 mol.%, and that the optimal concentration for b3+ doping is 3 mol.%. in the photoluminescent studies, increasing the b3+ ion concentration caused the intensities of both the excitation and emission peaks to increase and then decrease. in addition, the color tone changes gradually, from the near-white-light region, through greenish, and finally to yellowish. this change is caused by a decrease in the symmetry of the local structure around the dy3+ ion when the b3+ ion in the host reaches the optimum concentration for the h3bo3 flux of 3 mol.%. when the b3+ content is increased further, the distinct difference in ionic radius between the lattice atoms and the substituent atoms causes the lattice to become distorted and the crystallinity of the (y0.9dy0.1)inge2o7 phosphor to decrease.

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