Characterization and Luminescence Properties of YAG: Ce3+ Phosphors by Molten Salt Synthesis
Characterization and Luminescence Properties of YAG: Ce3+ Phosphors by Molten Salt Synthesis
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DOI：
10.1111/j.1551-2916.2011.04948.x
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发表时间：
2012
影响因子：
3.9
通讯作者：
Huijuan Yang;G. Zhu;Le Yuan;Chi Zhang;Feng-sheng Li;Hua-rui Xu;A. Yu
中科院分区：
文献类型：
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作者：
Huijuan Yang;G. Zhu;Le Yuan;Chi Zhang;Feng-sheng Li;Hua-rui Xu;A. Yu
以NaNO2-KNO2或NaCl-KCl共晶混合物为熔剂，通过熔盐合成（MSS）法成功制备了Y2.9Ce0.1Al5O12（YAG：Ce3+）荧光粉。以NaCl-KCl为助熔剂，在1000℃以上形成Y3Al5O12相，所制备的平均粒径为2μm的YAG:Ce3+荧光粉具有良好的发射光谱和激发光谱。以NaNO2-KNO2为助熔剂，Y3Al5O12相可在低至400℃的温度下形成，但所制备的平均粒径为200 nm的YAG:Ce3+荧光粉没有明显的发射和激发光谱，而在1100℃退火后，粉末也具有200 nm的平均粒径，但具有更强的发射和激发光谱。与商用YAG:Ce3+荧光粉相比，采用NaNO2-KNO2作为助熔剂并进行煅烧的MSS制备的荧光粉的发射强度稍低，但后者的粒径较小，这将减少白光发光二极管中荧光粉的用量。
The Y2.9Ce0.1Al5O12 (YAG:Ce3+) phosphors were successfully prepared via molten salt synthesis (MSS) method using the eutectic mixtures of NaNO2–KNO2 or NaCl–KCl as the flux. Using NaCl–KCl as the flux, Y3Al5O12 phase is formed above 1000°C, and the as-prepared YAG:Ce3+ phosphor with 2 μm average particle size has good emission and excitation spectra. Using NaNO2–KNO2 as the flux, Y3Al5O12 phase can be formed at a temperature as low as 400°C, but the as-prepared YAG:Ce3+ phosphor with 200 nm average particle size do not have obvious emission and excitation spectra, and after being annealed at 1100°C, the powder also has 200 nm average particle size but has stronger emission and excitation spectra. Compared with the commercial YAG:Ce3+ phosphor, the emission intensity of the phosphor prepared by MSS using NaNO2–KNO2 as the flux followed by calcination is a little low, but the latter has a smaller particle size, which will reduce the amount of phosphors utilized in white light-emitting diodes.