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High Temperature Spectrally Selective Thermal Emitter
High Temperature Spectrally Selective Thermal Emitter
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机译:高温光谱选择性热发射器
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摘要
The present invention enables elective emission from a heterogeneous metasurface that can survive repeated temperature cycling at high temperatures (e.g., greater than 1300 K). Simulations, fabrication and characterization were performed for an exemplary cross-over-a-backplane metasurface consisting of platinum and alumina layers on a sapphire substrate. The structure was stabilized for high temperature operation by an encapsulating alumina layer. The geometry was optimized for integration into a thermophotovoltaic (TPV) system and was designed to have its emissivity matched to the external quantum efficiency spectrum of 0.6 eV InGaAs TPV material. Spectral measurements of the metasurface resulted in a predicted 32% optical-to-electrical power conversion efficiency. The broadly adaptable selective emitter design can be easily scaled for integration with TPV systems.
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机译:本发明使得能够从异质超颖表面选择性地发射,该异质超颖表面可以在高温(例如,大于1300K)的反复温度循环中幸存下来。对由蓝宝石衬底上的铂和氧化铝层组成的示例性跨底板超表面进行了仿真,制作和表征。通过封装氧化铝层使结构稳定以用于高温操作。该几何结构经过优化,可以集成到热光电(TPV)系统中,并设计为使其发射率与0.6 eV InGaAs TPV材料的外部量子效率谱相匹配。超颖表面的光谱测量导致了32%的光电功率转换效率。广泛适用的选择性发射极设计可轻松扩展,以与TPV系统集成。
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