A refractory metal-based photonic narrowband emitter for thermophotovoltaic energy conversion
A refractory metal-based photonic narrowband emitter for thermophotovoltaic energy conversion
复制标题
用于热光伏能量转换的难熔金属基光子窄带发射器
DOI：
10.1039/d2tc04644j
复制
发表时间：
2023
影响因子：
6.4
通讯作者：
Zheng, Yi
中科院分区：
文献类型：
--
作者：
Chen, Fangqi;Liu, Xiaojie;Liu, Yang;Tian, Yanpei;Zheng, Yi
热光化学是一种很有前途的热回收技术，在过去的几十年里受到了极大的关注。在热光伏系统中，需要选择性发射器来转换入射光，以便发射与PV电池的带隙匹配的适当光子，既避免了低能量无用光子，又避免了由高能量光子引起的热化损失。本工作的目的是设计一种金属基光子窄带发射器，它是由钨，一种耐火材料，可以承受热光伏系统的高工作温度。此外，全金属发射极的优点是不存在热膨胀失配的问题。六边形和正方形图案化阵列进行了数值分析和参数研究进行不同的特征尺寸，间隙，和图案的高度，导致发射峰位移和带宽的变化。此外，使用光刻方法制备了光子金属基发射器，对其进行了光学表征并与计算的发射率谱进行了比较。该工作为高温热管理、能量收集和发电的研究提供了参考。
Thermophotovoltaics is a promising technology for heat recovery and has garnered tremendous attention in the past decades. In a thermophotovoltaic system, a selective emitter is required to convert the incoming light in order to emit appropriate photons matched with the bandgap of the PV cell, both avoiding low-energy useless photons and thermalization loss caused by high-energy photons. This work aims to design a metal-based photonic narrowband emitter, and it is composed of tungsten, a refractory material which can withstand the high working temperature of the thermophotovoltaic system. Besides, the advantage of an all-metal emitter is that there is no concern of thermal expansion mismatch. Hexagon and square patterned arrays are numerically analyzed and a parametric study is conducted for different feature sizes, gaps, and pattern heights, leading to an emission peak shift and bandwidth change. Besides, a photonic metal-based emitter is fabricated using a photolithography method, optically characterized and compared with the calculated emissivity spectra. This work sheds light on the research of high-temperature thermal management, energy harvesting and power generation.