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首页> 外文期刊>WSEAS Transactions on Applied and Theoretical Mechanics >Design of a One-Dimensional Multilayer Si/SiO_2 Photonic Crystals for Thermophotovoltaic Filters
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Design of a One-Dimensional Multilayer Si/SiO_2 Photonic Crystals for Thermophotovoltaic Filters

机译：一维多层Si / SiO_2光子晶体的热光电滤波器设计

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摘要

In this paper, a one - dimensional multilayer is optimized for potential applications as thermophotovoltaic (TPV) selective filter. The proposed TPV filter was fabricated through a magnetron sputtering process by using the radio frequency (RF) magnetron sputtering system. The spectral reflectance and transmittance of the proposed TPV filter are measured by using spectral transmittance and reflectance measurement system at wavelength from 0.3 μm to 2.5 μm at near normal incident 8°. The bidirectional reflectance/transmittance distribution function BRDF/BTDF are measured by three axis automated scatterometer (TAAS). The calculated spectral reflectance and transmittance of the proposed TPV selective filter has shown several peaks and large oscillations, due to the refractive index mismatch between the proposed TPV filter sample and substrate. The measured results show that the proposed filter has high transmittance value in the spectral range of λ ≤ 1.73μm and high BTDF ● cosθ value for both of the TE and TM polarization. It also has low BRDF ● cosθ value at normal incidence due to detector blocks the laser beam. The measured results are in good agreement with the simulation results. The spectral efficiency of the TPV system with the proposed selective filter is above than 0.43 at emitter temperature > 1600K. The results show that the 1D 8-layer Si/SiO_2 sample, if used as a selective filter with a low band gap photovoltaic cell (GaSb), would lead to high TPV overall efficiency and high electrical output power. All numerical results are obtained by using the rigorous coupled-wave analysis (RCWA) method.
机译：在本文中，针对潜在应用优化了一维多层膜，如热光伏（TPV）选择性滤光片。通过使用射频（RF）磁控溅射系统，通过磁控溅射工艺制造了拟议的TPV滤波器。通过使用光谱透射率和反射率测量系统，在接近法线入射8°的波长下，从0.3μm到2.5μm的波长，测量所提出的TPV滤光片的光谱反射率和透射率。双向反射/透射率分布函数BRDF / BTDF通过三轴自动散射仪（TAAS）进行测量。由于建议的TPV滤光片样品和基材之间的折射率不匹配，因此所建议的TPV选择性滤光片的光谱反射率和透射率显示出几个峰值和较大的振荡。测量结果表明，所提出的滤波器在λ≤1.73μm的光谱范围内具有较高的透射率值，并且对于TE和TM偏振均具有较高的BTDF●cosθ值。由于检测器挡住了激光束，它在垂直入射时的BRDF●cosθ值也很低。测量结果与仿真结果吻合良好。在发射器温度> 1600K时，带有建议的选择性滤波器的TPV系统的光谱效率高于0.43。结果表明，如果将一维8层Si / SiO_2样品用作具有低带隙光伏电池（GaSb）的选择性滤光片，则将导致高TPV总体效率和高电输出功率。所有数值结果均使用严格的耦合波分析（RCWA）方法获得。

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