Mn2+离子掺杂的NaTaOGeO4∶Tb3+的发光性能

于潘龙; 田莲花

doi:doi:10.3788/fgxb20183909.1200

发光学报, 2018, 39 (9): 1200, 网络出版: 2018-09-08

Mn2+离子掺杂的NaTaOGeO4∶Tb3+的发光性能

Photoluminescence Properties and Color Tunable of NaTaOGeO4∶Tb3+ Co-doped with Mn2+ Ion

论文大纲

于潘龙田莲花 ^*

作者单位

延边大学理学院物理系, 吉林延吉 133002

稀土离子过渡金属荧光粉颜色可调发光特性 rare earth ions transition metal phosphors color tunable luminescence

摘要

采用高温固相法制备了颜色可调的NaTaOGeO4∶Tb3+,Mn2+荧光粉, 并研究了其发光特性以及能量传递机理。在244 nm激发下, NaTaOGeO4∶Tb3+的发射光谱的发射峰分别位于380, 413, 436, 492, 544 nm, 分别属于Tb3+的5D3→7FJ和5D4→7FJ(J=6, 5, 4)能级跃迁, 为蓝光和绿光发射。在280 nm波长激发下, 在492 nm和544 nm处有较强的发射峰, 分别属于Tb3+的5D4→7F6、5D4→7F5能级跃迁, 为绿光发射。在248 nm波长激发下, NaTaOGeO4∶Mn2+的发射光谱由位于576 nm处的宽带组成, 属于Mn2+的4T1→6A1能级跃迁。当在NaTaOGeO4∶Tb3+荧光粉中共掺杂Mn2+时, 可以同时观察到Mn2+和Tb3+的发射峰, 通过改变浓度掺杂比, 可以得到颜色可调控的荧光粉。

Abstract

The photoluminescence properties and energy transfer mechanism of a color tunable phosphor NaTaOGeO4∶Tb3+,Mn2+ were investigated in this paper. NaTaOGeO4∶Tb3+,Mn2+ powder was synthesized successfully by solid state reaction method. The phase purity was checked using X-ray powder diffractometry(XRD). The excitation and emission spectra were recorded to elucidate the photoluminescence properties of NaTaOGeO4∶Tb3+,Mn2+. Furthermore, the fluorescence lifetime measurements were performed. The emission spectrum of NaTaOGeO4∶Tb3+ excited by 244 nm shows blue emissions at 380, 413, 436, 492, 544 nm, which are attributed to 5D3→ 7FJ and 5D4→7FJ(J=6, 5, 4)transition of Tb3+, respectively. The emission spectrum of NaTaOGeO4∶Tb3+ excited by 277 nm shows green emissions at 492 nm and 544 nm, which are attributed to 5D4→7F6 and 5D4→7F5 transition of Tb3+. The emission spectrum of NaTaOGeO4∶Mn2+ shows orange-red emissions at 576 nm, owing to 4T1→6A1 transition of Mn2+. With varying the ratio of the concentration of Mn2+ and Tb3+, a color tunable phosphor NaTaOGeO4∶Tb3+,Mn2+ can be obtained.

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于潘龙, 田莲花. Mn2+离子掺杂的NaTaOGeO4∶Tb3+的发光性能[J]. 发光学报, 2018, 39(9): 1200. YU Pan-long, TIAN Lian-hua. Photoluminescence Properties and Color Tunable of NaTaOGeO4∶Tb3+ Co-doped with Mn2+ Ion[J]. Chinese Journal of Luminescence, 2018, 39(9): 1200.

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