用于近场热光伏系统的基于米氏超材料的热发射器

Mie-Metamaterials-Based Thermal Emitter for Near-Field Thermophotovoltaic Systems.

作者信息

Ghanekar Alok, Tian Yanpei, Zhang Sinong, Cui Yali, Zheng Yi

机构信息

Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI 02881, USA.

College of Life Sciences, Northwest University, Xi'an 710069, China.

出版信息

Materials (Basel). 2017 Jul 31;10(8):885. doi: 10.3390/ma10080885.

DOI:10.3390/ma10080885

PMID:28773241

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5578251/

Abstract

In this work, we theoretically analyze the performance characteristics of a near-field thermophotovoltaic system consisting a Mie-metamaterial emitter and GaSb-based photovoltaic cell at separations less than the thermal wavelength. The emitter consists of a tungsten nanoparticle-embedded thin film of SiO 2 deposited on bulk tungsten. Numerical results presented here are obtained using formulae derived from dyadic Green's function formalism and Maxwell-Garnett-Mie theory. We show that via the inclusion of tungsten nanoparticles, the thin layer of SiO 2 acts like an effective medium that enhances selective radiative heat transfer for the photons above the band gap of GaSb. We analyze thermophotovoltaic (TPV) performance for various volume fractions of tungsten nanoparticles and thicknesses of SiO 2 .

摘要

在这项工作中，我们从理论上分析了一种近场热光伏系统的性能特征，该系统由一个米氏超材料发射器和基于GaSb的光伏电池组成，两者间距小于热波长。发射器由沉积在块状钨上的嵌入钨纳米颗粒的SiO₂薄膜组成。这里给出的数值结果是使用从并矢格林函数形式主义和麦克斯韦-加内特-米氏理论推导出来的公式获得的。我们表明，通过加入钨纳米颗粒，SiO₂薄层起到了有效介质的作用，增强了对GaSb带隙以上光子的选择性辐射传热。我们分析了不同钨纳米颗粒体积分数和SiO₂厚度下的热光伏（TPV）性能。