| 通过能量传递实现Ba5-2x-yTbxNax(PO4)3Cl∶yEu2+荧光粉的光谱调控 | |
| Spectral Control of Ba5-2x-yTbxNax(PO4)3Cl:yEu2+ Phosphor Achieved by Energy Transfer | |
| 摘要: 通过[Na+，Tb3+]离子对取代[Ba2+，Ba2+]离子对，制备了一系列的Ba5-2x-yTbxNax（PO4）3Cl∶yEu2+荧光粉。通过X射线粉末衍射、扫描电子显微镜、光致激发和发射光谱对其结构、形貌、组成及发光性能进行研究。结果表明：在354 nm激发下，Ba3.97Tb0.50Na0.50（PO4）3Cl∶0.03Eu2+样品的发射光谱既包含了Eu2+位于450 nm左右的宽带特征发射，又包含了Tb3+位于490、545、583和622 nm的窄峰特征发射。由于存在Eu2+→Tb3+的能量传递，使得Ba3.97Tb0.50Na0.50（PO4）3Cl∶0.03Eu2+中Tb3+的发光强度相对于Ba4.00Tb0.50Na0.50（PO4）3Cl中Tb3+的发光强度显著提高。通过改变[Na+，Tb3+]离子对的浓度，实现了对Ba5-2x-yTbxNax（PO4）3Cl∶yEu2+荧光粉的光谱调控。当x=0.50时，Ba4.97-2xTbxNax（PO4）3Cl∶0.03Eu2+中Tb3+的发光强度达到最大。 | |
| 关键词: 荧光粉 化学单元取代 能量传递 光谱调控 | |
| 基金项目: 国家自然科学基金（No.51472132）资助。 | |
| Abstract: In this paper, a series of Ba5-2x-yTbxNax(PO4)3Cl:yEu2+ phosphor powder was prepared via [Na+, Tb3+] ion pairs substituting [Ba2+, Ba2+] ion pairs. The structure, morphology, composition and luminescence properties were studied through X-ray powder diffraction, scanning electron microscope, photoexcitation and emission spectroscopy. Under excitation at 354 nm, the emission spectra of Ba3.97Tb0.50Na0.50(PO4)3Cl:0.03Eu2+ sample was composed of the characteristic broad peak of Eu2+ at about 450 nm and the four characteristic sharp peaks of Tb3+ at 490, 545, 583 and 622 nm. Due to Eu2+→Tb3+ energy transfer, the luminescence intensity of Tb3+ in Ba3.97Tb0.50Na0.50(PO4)3Cl:0.03Eu2+ was significantly increased compared with that of Tb3+ in Ba4.00Tb0.50Na0.50(PO4)3Cl sample. By changing the concentration of [Na+, Tb3+] ion pairs, the spectral control of Ba5-2x-yTbxNax(PO4)3Cl:yEu2+ phosphor was achieved. When x=0.50, the luminescence intensity of Tb3+ in Ba4.97-2xTbxNax(PO4)3Cl:0.03Eu2+ reached the maximum. | |
| Keywords: phosphor chemical unit substitution energy transfer spectral control | |
| 投稿时间：2021-02-05 修订日期：2021-05-29 | |
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| 张雪,宋宏基,马楠,刘杰,张星星,吴占超.通过能量传递实现Ba5-2x-yTbxNax(PO4)3Cl∶yEu2+荧光粉的光谱调控[J].无机化学学报,2021,37(7):1251-1257. | |
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