Terahertz transmission properties of antimony doped tin oxide powder
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摘要: 以SnCl45H2O和SbCl3为原料，采用液相化学共沉淀法制备锑掺杂氧化锡（ATO）粉体。分析了不同Sb掺杂质量分数条件下，ATO粉体的禁带宽度变化，并对材料在0.2~1.6 THz波段的透射时域和频域谱，以及吸收和屏蔽参数进行了对比分析。结果表明，ATO粉体的禁带宽度随着Sb掺杂量的增加先减小后增大；同时，ATO粉体对THz波的吸收系数随着Sb掺杂量的增加先增大后减小，当Sb掺杂质量分数为9%时，ATO的吸收系数在1.25 THz处达到最大值156.5 cm-1，屏蔽效能在1.24~1.60 THz范围内最高达到45.0 dB。Abstract: Antimony doped tin oxide (ATO) powder was prepared by liquid phase chemical coprecipitation method with the SnCl45H2O and SbCl3 used as raw materials. The effects of the doping concentration of Sb on the energy gap, and the transmission characteristics in 0.2-1.6 THz were investigated. In particular, the THz time-domain and frequency-domain spectra, the absorption and shielding effect of the ATO were measured. The results indicate that, the energy gap of the ATO decreases first but then increases with the increase of the Sb doping amount. The same tendency emerges in the change of the THz absorption and shielding effect. In the 1.24-1.60 THz range, the ATO with a Sb doping amount of 9% exhibits the highest shielding efficiency of about 45 dB.
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Key words:
- terahertz /
- antimony doped tin oxide /
- doping /
- band gap /
- absorption /
- shielding
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