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首页> 美国卫生研究院文献>Scientific Reports >Impacts of propagating frustrated and surface modes on radiative electrical and thermal losses in nanoscale-gap thermophotovoltaic power generators
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Impacts of propagating frustrated and surface modes on radiative electrical and thermal losses in nanoscale-gap thermophotovoltaic power generators

机译：传播受阻和表面模式对纳米间隙热光电发电机中辐射电和热损耗的影响

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摘要

The impacts of radiative, electrical and thermal losses on the performances of nanoscale-gap thermophotovoltaic (nano-TPV) power generators consisting of a gallium antimonide cell paired with a broadband tungsten and a radiatively-optimized Drude radiator are analyzed. Results reveal that surface mode mediated nano-TPV power generation with the Drude radiator outperforms the tungsten radiator, dominated by frustrated modes, only for a vacuum gap thickness of 10 nm and if both electrical and thermal losses are neglected. The key limiting factors for the Drude- and tungsten-based devices are respectively the recombination of electron-hole pairs at the cell surface and thermalization of radiation with energy larger than the cell absorption bandgap. A design guideline is also proposed where a high energy cutoff above which radiation has a net negative effect on nano-TPV power output due to thermal losses is determined. It is shown that the power output of a tungsten-based device increases by 6.5% while the cell temperature decreases by 30 K when applying a high energy cutoff at 1.45 eV. This work demonstrates that design and optimization of nano-TPV devices must account for radiative, electrical and thermal losses.
机译：分析了辐射，电和热损耗对纳米间隙热光伏（nano-TPV）发电机性能的影响，该发电机由锑化镓电池和宽带钨组成，并经过辐射优化。结果表明，仅在真空间隙厚度为10 nm且电和热损耗均被忽略的情况下，采用Drude散热器的表面模式介导的纳米TPV发电性能优于受阻模式主导的钨散热器。基于Drude和钨的器件的关键限制因素分别是细胞表面电子空穴对的重组以及能量大于细胞吸收带隙的辐射热。还提出了设计指南，其中确定了高能量截止值，在该能量截止值之上，辐射由于热损耗而对纳米-TPV功率输出产生了净负面影响。结果表明，当在1.45 eV处施加高能量截止时，钨基器件的功率输出增加6.5％，而电池温度降低30K。这项工作表明，纳米TPV设备的设计和优化必须考虑辐射，电和热损失。

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