Thermophotovoltaic generation with selective radiators based on tungsten surface gratings
Thermophotovoltaic generation with selective radiators based on tungsten surface gratings
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DOI：
10.1063/1.1807031
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发表时间：
2004-10
影响因子：
4
通讯作者：
H. Sai;H. Yugami
中科院分区：
文献类型：
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作者：
H. Sai;H. Yugami
在单晶钨基板上制作了由矩形微腔组成的周期为1.0-0.2μm的二维表面浮雕光栅，以开发用于热光伏发电的光谱选择性辐射器。散热器在近红外区域显示出强烈的发射，窄带隙光伏电池可以将光子转化为电能。热发射的增强归因于微腔效应。进行了发电测试，与 SiC 散热器相比，W 光栅的发电效率高出两倍以上。结果表明，微结构钨辐射器是良好的选择性辐射器，具有高效率和高功率密度。
Two-dimensional surface-relief gratings with a period of 1.0–0.2μm composed of rectangular microcavities were fabricated on single crystalline W substrates to develop spectrally selective radiators for thermophotovoltaic generation. The radiators displayed strong emission in the near-infrared region where narrow-band-gap photovoltaic cells could convert photons into electricity. The enhancement of thermal emission was attributed to the microcavity effect. Power generation tests were carried out and the W gratings showed more than two times higher generation efficiency, compared to a SiC radiator. The results showed that the microstructured W radiators behave as good selective radiator, with both high efficiency and high power density.