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首页> 外文期刊>Renewable energy >New development of one-dimensional Si/SiO_2 photonic crystals filter for thermophotovoltaic applications
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New development of one-dimensional Si/SiO_2 photonic crystals filter for thermophotovoltaic applications

机译：用于热光电应用的一维Si / SiO_2光子晶体滤光片的新进展

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摘要

One-dimensional (1D) Si/SiO_2 photonic crystals (PhCs) are regarded as the most promising candidates for thermophotovoltaic (TPV) optical filters. The performance of TPV devices can be significant improved with the designed 1D ten-layer Si/SiO_2 PhC of excellent stop-band characteristic. However, large oscillations around 1.45-1.75 μm in the pass band of this PhC filter would reduce the above band-gap power transmitted to the cells, leading to discounts of the system efficiency and power density. This work focused on the pass-band characteristics of the 1D Si/SiO_2 PhCs. The mechanism of the large oscillations mentioned above was discussed and a modified 1D five-unit Si/SiO_2 PhC in which the first and fifth units serve as refractive index match units to smooth the large oscillations in the pass band was presented. The simulation indicated that the modified 1D PhC exhibited much flatter and lower pass band around 1.45-1.75 μm than that of the original 1D PhC, even for large incident angle of 45° for both TM and TE polarizations. Both PhCs in the modified and original structures were prepared through a magnetron sputtering process and the measured optical characteristics showed good coherence with the simulation results. An ideal thermodynamic model was then applied to predict the improvement of the TPV system performance by utilizing the modified 1D PhC filter. The results indicated that the modified 1D PhC would lead to 21.0-5.9% increase of the spectral efficiency and 14.8-5.3% increase of the power density at 1200-1800 K radiator temperature.
机译：一维（1D）Si / SiO_2光子晶体（PhC）被认为是热光电（TPV）滤光器的最有希望的候选者。通过设计具有出色阻带特性的一维十层Si / SiO_2 PhC，TPV器件的性能可以得到显着改善。但是，此PhC滤波器的通带中约1.45-1.75μm处的大振荡将降低上述传输到单元的带隙功率，从而导致系统效率和功率密度的降低。这项工作集中于一维Si / SiO_2 PhC的通带特性。讨论了上述大振荡的机理，并提出了一种改进的一维五单元Si / SiO_2 PhC，其中第一和第五单元用作折射率匹配单元，以平滑通带中的大振荡。仿真表明，即使对于TM和TE偏振，当入射角为45°时，经过修改的一维PhC的通带也比原始一维PhC平坦得多，并在1.45-1.75μm处具有较低的通带。修改后的结构和原始结构中的PhC都是通过磁控溅射工艺制备的，所测得的光学特性与仿真结果显示出良好的相干性。然后，利用改进的一维PhC滤波器，将理想的热力学模型应用于预测TPV系统性能的提高。结果表明，在1200-1800 K散热器温度下，改进的1D PhC可使光谱效率提高21.0-5.9％，功率密度提高14.8-5.3％。

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  • 来源
    《Renewable energy》 |2010年第1期|249-256|共8页
  • 作者

    Lei Mao; Hong Ye;

  • 作者单位

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 96 Jin Zai Road, Hefei City, Anhui 230027, PR China;

    Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei, 96 Jin Zai Road, Hefei City, Anhui 230027, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photonic crystals; thermophotovoltaic;

    机译：光子晶体;热光伏;

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