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首页> 外文期刊>International Journal of Heat and Mass Transfer >Selective absorption of a thermophotovoltaic cell using a thin semiconductor and a top fishnet-structured electrode
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Selective absorption of a thermophotovoltaic cell using a thin semiconductor and a top fishnet-structured electrode

机译：使用薄半导体和顶部网状结构电极的热光电电池的选择性吸收

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摘要

The electromagnetic field around a thermophotovoltaic (TPV) cell made of a metal-semiconductor-metal (MSM) multilayer with a square-grid electrode layer, referred to as a fishnet layer, was numerically calculated using a three-dimensional finite difference time domain method to obtain the absorptance of the MSM multilayer. In this study, gold and gallium antimony assumed to be materials of the metal and semiconductor layer, respectively. Even if there was no top metal layer, several peaks of absorptance were observed because of the optical interference inside the gallium antimony thin film. Here, the peak wavelength shifted to a shorter wavelength region by placing a fishnet layer on the gallium antimony layer. Moreover, the wavelength of the first peak of the optical interference could be adjusted at the active range of wavelength from 0.8 um to 1.8 um for the TPV cell made of gallium antimony for a practical power generation system. As a result, even in a several hundred nanometers thickness of semiconductor, a 60% of radiant energy absorbed could be concentrated in the active range of wavelength that is defined as a spectral efficiency. From the simulation results with an equivalent waveguide model, the shift of the first peak using the fishnet layer could be described using a dispersion relation of the waveguide, which was fulfilled with gallium antimony. Moreover, the superposition of different resonant modes originated from the waveguide-like structure and strip-wired structure affected the spectral absorption of the MSM multilayer when the wall of the fishnet structure was expanded. (C) 2019 Elsevier Ltd. All rights reserved.
机译：使用三维有限差分时域方法，对由具有方形网格电极层的金属-半导体-金属（MSM）多层构成的热光电（TPV）电池周围的电磁场进行了数值计算，该网状电极层称为鱼网层以获得MSM多层的吸收率。在这项研究中，金和镓锑分别假定为金属和半导体层的材料。即使没有顶层金属层，由于镓锑薄膜内部的光干涉，也观察到几个吸收率峰。在此，通过将鱼网层放置在镓锑层上，峰值波长移动到较短的波长区域。而且，对于实际的发电系统，对于由镓锑制成的TPV电池，可以在0.8μm至1.8μm的有效波长范围内调节光干涉的第一峰值的波长。结果，即使在几百纳米的半导体厚度中，吸收的60％的辐射能也可以集中在定义为光谱效率的波长有效范围内。根据等效波导模型的仿真结果，可以使用波导的色散关系描述使用鱼网层的第一个峰的位移，而镓锑可以满足该关系。此外，当扩大鱼网结构的壁时，源自谐振器状结构和带状线结构的不同共振模式的叠加影响了MSM多层的光谱吸收。 （C）2019 Elsevier Ltd.保留所有权利。

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