JIANG Yaogeng,TIAN Lianhua.Luminescence properties and energy transfer of near-infrared SrGa12O19 phosphor[J].Journal of Yanbian University,2024,(02):15-22.
近红外SrGa12O19荧光粉特性及能量传递
- Title:
-
Luminescence properties and energy transfer of near-infrared SrGa
12 O19 phosphor
- 文章编号:
- 1004-4353（2024）02-0015-08
- 分类号:
- O482.31
- 文献标志码:
- A
- 摘要:
- 采用高温固相法制备了一种共掺Cr3+和Yb3+的SrGa12O19荧光粉．通过X射线衍射仪、扫描电子显微镜和光致发光光谱对荧光粉的物相纯度、化学组成和发光性能进行表征.结果显示：当以Cr3+的4A2→4T1激发位置(468nm)激发Cr3+和Yb3+共掺杂的SrGa12O19荧光粉时，SrGa12O19荧光粉的发射光谱中同时出现了Cr3+和Yb3+的发射峰，这表明在SrGa12O19基质中存在Cr3+→Yb3+的能量传递．样品中Yb3+的发射范围在950～1100nm，与晶体硅(c-Si)太阳能电池的光谱响应区域相匹配.提高Cr3+的掺杂浓度，不仅能够增强Yb3+的发光强度，而且样品在207℃下的光强度为初始发光强度的82.1%．研究结果可为SrGa12O19荧光粉在c-Si太阳能电池光谱转换提高效率提供借鉴与参考．
- Abstract:
- In this paper，phosphor SrGa12O19 co-doped with Cr3+ and Yb3+ was prepared by high temperature solid-phase method.X-ray diffractometer，scanning electron microscope and photoluminescence spectroscopy were used to characteristic the physical phase purity，chemical composition and luminescence properties of the phosphor. The results show that the emission spectra of Cr3+ and Yb3+co-doped SrGa12O19 phosphor exhibits both of Cr3+ and Yb3+ emission peaks with excitation wavelength of 468 nm which is contributed to the 4A2→ 4T1 transition of Cr3+，the emission peaks of Cr3+ and Yb3+ appeared in the SrGa12O19 phosphor at the same time，which indicates that there is an energy transfer of Cr3+→Yb3+ in the SrGa12O19 host. The emission of Yb3+ in the phosphor is in the range of 950—1100 nm，which matches the spectral response region of crystalline silicon (C-Si) solar cells. The luminescence intensity of Yb3+ can be enhanced by increasing the doping concentration of Cr3+， and the phosphor can still maintain 82.1% of the initial luminescence intensity at a temperature of 207 ℃. The results of this study can provide a good reference for the study of strategy to improve the spectral conversion efficiency of SrGa12O19 phosphor in C-Si solar cells.
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备注/Memo
投稿日期：2024-01-23
第一作者：蒋尧庚（1997—），男，硕士研究生，研究方向为发光学.
通信作者：田莲花（1972—），女，博士，教授，研究方向为发光学.