Medium-Bridge Near-Field Thermophotovoltaic System

IF 2.7 3区工程技术 Q2 ENGINEERING, MECHANICAL

Nanoscale and Microscale Thermophysical Engineering Pub Date : 2023-04-21 DOI:10.1080/15567265.2023.2202699

Xin-Bo Zhang, Cheng-Long Zhou, Feng Gu, Xiao-Ping Luo, Yong Zhang, H. Yi

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引用次数: 0

Abstract

ABSTRACT The energy conversion performance of thermophotovoltaic (TPV) systems can be improved when the vacuum gap between the emitter and the TPV cell is at the near-field owing to the photon tunneling of evanescent waves. Among them, the back-gapped-reflector TPV systems have gained interest as a method of improving their conversion efficiency by optimizing the spectral absorption of TPV cells. In this work, we introduce an alternative concept for the back-gapped-reflector TPV systems, namely the medium-bridge near-field TPV system, by building a medium bridge between the metal reflector and the TPV cell using SU8 nanofilm. The SU8 medium-bridge achieves a noticeable improvement in output performance by increasing the spectral absorption of the InAs cell and reducing parasitic absorption losses of the Au substrate. The results indicate that, as a consequence of the improved effect of the medium-bridge, the output power density and efficiency of this system exceed those of the conventional TPV system (which lacks a medium-bridge) by 26.4% and 36.5%, respectively. Moreover, we systematically analyze the modulation of medium-bridge thicknesses and cell thickness on output performance and clarify how both affect energy losses of this near-field TPV system. Our work offers a strategy to improve the energy conversion performance of the near-field TPV system, opening new opportunities for developing near-field energy conversion.

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中桥近场热光伏系统

热光伏(TPV)系统的能量转换性能在近场时，由于倏逝波的光子隧穿，使得发射极和TPV电池之间的真空间隙处于近场。其中，背隙反射器TPV系统作为一种通过优化TPV电池的光谱吸收来提高其转换效率的方法而受到关注。在这项工作中，我们为背隙反射器TPV系统引入了一种替代概念，即中桥近场TPV系统，通过使用SU8纳米膜在金属反射器和TPV电池之间建立一个介质桥。SU8中桥通过增加InAs电池的光谱吸收和减少Au衬底的寄生吸收损失，实现了输出性能的显着改善。结果表明，由于中桥的改进效果，该系统的输出功率密度和效率分别比传统的TPV系统(没有中桥)提高了26.4%和36.5%。此外，我们系统地分析了中桥厚度和电池厚度对输出性能的调制，并阐明了两者如何影响近场TPV系统的能量损失。我们的工作为提高近场TPV系统的能量转换性能提供了策略，为近场能量转换的发展开辟了新的机遇。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanoscale and Microscale Thermophysical Engineering 工程技术-材料科学：表征与测试

CiteScore

5.90

自引率

2.40%

发文量

审稿时长

3.3 months

期刊介绍： Nanoscale and Microscale Thermophysical Engineering is a journal covering the basic science and engineering of nanoscale and microscale energy and mass transport, conversion, and storage processes. In addition, the journal addresses the uses of these principles for device and system applications in the fields of energy, environment, information, medicine, and transportation. The journal publishes both original research articles and reviews of historical accounts, latest progresses, and future directions in this rapidly advancing field. Papers deal with such topics as: transport and interactions of electrons, phonons, photons, and spins in solids, interfacial energy transport and phase change processes, microscale and nanoscale fluid and mass transport and chemical reaction, molecular-level energy transport, storage, conversion, reaction, and phase transition, near field thermal radiation and plasmonic effects, ultrafast and high spatial resolution measurements, multi length and time scale modeling and computations, processing of nanostructured materials, including composites, micro and nanoscale manufacturing, energy conversion and storage devices and systems, thermal management devices and systems, microfluidic and nanofluidic devices and systems, molecular analysis devices and systems.