Thermally switchable meta-material absorber involving vanadium dioxide semiconductor-metal transition for thermo photovoltaic conversion

被引：8

作者：

Bendelala, Fathi ^{[1
]}

Cheknane, Ali ^{[1
]}

Hilal, Hikmat S. ^{[2
]}

机构：

[1] Univ Amar Telidji Laghouat, Lab Semiconducteurs Materiaux Fonctionnels, Bd Martyrs BP37G, Laghouat 03000, Algeria

[2] An Najah N Univ, Chem, POB 7, Nablus, West Bank, Palestine

来源：

MATERIALS RESEARCH EXPRESS | 2018年 / 5卷 / 01期

关键词：

thermo-photovoltaic; absorption; polarization-insensitive; meta-materials; vanadium dioxide; OPTICAL-PROPERTIES; METAMATERIAL ABSORBERS;

D O I：

10.1088/2053-1591/aaa652

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new switchable absorber design using meta-materials for thermo photovoltaic applications is proposed here. Conventional absorbents are normally non-adjustable with narrow band-widths and polarization-dependence. The present study describes an alternative infrared absorber structure with tunable characteristics. The absorber is based on VO2 which exhibits transition from semiconductor to metallic conductor by thermal effect. With this design, the results show that wide-band absorption can be achieved. The absorption bandwidth can be improved from 15.94 to 36.75 THz. With 40.42% relative shift in the peak frequency, a maximum absorption efficiency of 99% can be achieved. This structure design is polarization-independent of normal incident radiations, and may accommodate radiations from wide oblique angles. These new features make the new thermally adjustable absorber potentially useful in thermo-photovoltaic conversion devices.

引用

页数：9

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