1.江西理工大学 化学化工学院, 江西 赣州 341000
2.江西稀土功能材料科技有限公司, 江西 赣州 341000
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Ming-hua WANG, Jin-sheng LIAO, Li-yun KONG, et al. Preparation and Energy Transfer Mechanism of Single-host White-light-emitting NaLaMgWO6:Dy3+/Bi3+ Phosphor. [J]. Chinese Journal of Luminescence 41(5):519-528(2020)
Ming-hua WANG, Jin-sheng LIAO, Li-yun KONG, et al. Preparation and Energy Transfer Mechanism of Single-host White-light-emitting NaLaMgWO6:Dy3+/Bi3+ Phosphor. [J]. Chinese Journal of Luminescence 41(5):519-528(2020) DOI: 10.3788/fgxb20204105.0519.
采用高温固相法制备了一系列单基质荧光粉NaLa,1-,x-y,MgWO,6,:,x,Dy,3+,/,y,Bi,3+,(,x,=0.01,0.02,0.04,0.06;,y,=0.01,0.02,0.04,0.06)。通过对Dy,3+,/Bi,3+,双掺杂浓度进行优化,Bi,3+,离子的掺杂不仅可以有效增强荧光粉的发光强度,还实现了发光颜色的可调。通过对系列NaLaMgWO,6,:,x,Dy,3+,/0.02Bi,3+,样品的荧光衰减曲线的分析可知,Dy,3+,离子浓度从1%增加到6%,Bi,3+,离子的荧光寿命逐渐减少,从而有力地证明了NaLaMgWO,6,:Bi,3+,/Dy,3+,荧光粉中存在Bi,3+,→Dy,3+,的能量传递过程。另外,通过电多极相互作用公式计算可知,Bi,3+,→Dy,3+,能量传递过程为偶极-偶极的相互作用,最优Bi,3+,/Dy,3+,掺杂样品的能量传递效率达到42.67%。在紫外光的有效激发下,通过改变Dy,3+,离子掺杂浓度,NaLaMgWO,6,:Bi,3+,/Dy,3+,荧光粉可以实现白光发射。研究证明NaLaMgWO,6,:Bi,3+,/Dy,3+,荧光粉是一种具有潜在应用前景的白光发光材料。
In this paper, a series of single-host phosphors NaLa,1-,x-y,MgWO,6,:,x,Dy,3+,/,y,Bi,3+, (,x,=0.01, 0.02, 0.04, 0.06;,y,=0.01, 0.02, 0.04, 0.06) were prepared by high temperature solid state method. By the optimization of Dy,3+,/Bi,3+, double codoping concentration, the doping of Bi,3+, ions can not only effectively enhance the luminescence intensity of phosphors, but also achieve the tune of luminescence color. The fluorescence lifetime of Bi,3+, for NaLaMgWO,6,:,x,Dy,3+,/0.02 Bi,3+, samples gradually decreased with the increased concentration of Dy,3+, ions (1%-6%), which proves strongly the presence of energy transfer process from Bi,3+, ions to Dy,3+, ions in NaLaMgWO,6,:Bi,3+,/Dy,3+, phosphors. According to the calculation of the electric multipole interaction formula, we can know that the energy transfer process of Bi,3+,→Dy,3+, is a dipole-dipole interaction and the energy transfer efficiency of the optimal Bi,3+,/Dy,3+, doped samples was calculated to be 42.67%. Under the effective excitation of the UV-light (ultraviolet light), NaLaMgWO,6,:Bi,3+,/Dy,3+, phosphor can realize the emission of white light by changing the amount of Dy,3+, ions. The research proves that NaLaMgWO,6,:Bi,3+,/Dy,3+, phosphor is a kind of white light emitting material with potential application prospects.
铋/镝离子共掺杂高温固相能量传递NaLaMgWO6
bismuth/dysprosium ion co-dopinghigh temperature solid stateenergy transferNaLaMgWO6
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