Spectral absorption control of femtosecond laser-treated metals and application in solar-thermal devices
作者机构：The Institute of OpticsUniversity of RochesterRochesterNY 14627USA These authors contributed equally:Sohail A.JalilBo Lai
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2020年第9卷第1期
页 面：1851-1859页
核心收录：
学科分类：0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070302[理学-分析化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by grants from the Bill&Melinda Gates Foundation(OPP1157723) the US Army Research Office(W911NF-15-1-0319) the National Science Foundation(1701163&1722169).
摘 要：Direct femtosecond(fs)laser processing is a maskless fabrication technique that can effectively modify the optical,electrical,mechanical,and tribological properties of materials for a wide range of potential applications.However,the eventual implementation of fs-laser-treated surfaces in actual devices remains challenging because it is difficult to precisely control the surface properties.Previous studies of the morphological control of fs-laser-processed surfaces mostly focused on enhancing the uniformity of periodic microstructures.Here,guided by the plasmon hybridisation model,we control the morphology of surface nanostructures to obtain more control over spectral light absorption.We experimentally demonstrate spectral control of a variety of metals[copper(Cu),aluminium(Al),steel and tungsten(W)],resulting in the creation of broadband light absorbers and selective solar absorbers(SSAs).For the first time,we demonstrate that fs-laser-produced surfaces can be used as high-temperature SSAs.We show that a tungsten selective solar absorber(W-SSA)exhibits excellent performance as a high-temperature solar receiver.When integrated into a solar thermoelectric generation(TEG)device,W-SSA provides a 130%increase in solar TEG efficiency compared to untreated W,which is commonly used as an intrinsic selective light absorber.
维普期刊数据库