A Zimmer

D Kraemer

D Trotter Jr

D Xia

DM Bierman

F Chen

GW Crabtree

J Karni

K Valleti

LA Weinstein

LL Baranowski

LY Chen

M Li

MH Liu

NP Sergeant

TM Tritt

WX Zhou

XF Li

Scientific Reports

AbstractIn this work, 4-layered SiO2/Bi2Te3/SiO2/Cu film structures were designed and fabricated and the optical properties investigated in the wavelength region of 250–1200 nm for their promising applications for direct solar-thermal-electric conversion. A typical 4-layered film sample with the structure SiO2 (66.6 nm)/Bi2Te3 (7.0 nm)/SiO2 (67.0 nm)/Cu (&gt;100.0 nm) was deposited on a Si or K9-glass substrate by magnetron sputtering. The experimental results agree well with the simulated ones showing an average optical absorption of 96.5%, except in the shorter wavelength region, 250–500 nm, which demonstrates the superior absorption property of the 4-layered film due to the randomly rough surface of the Cu layer resulting from the higher deposition power. The high reflectance of the film structure in the long wavelength region of 2–20 μm will result in a low thermal emittance, 0.064 at 600 K. The simpler 4-layered structure with the thermoelectric Bi2Te3 used as the absorption layer may provide a straightforward way to obtain solar-thermal-electric conversion more efficiently through future study.</jats:p

Er-Tao Hu

Yuan Yao

Kai-Yan Zang

Xin-Xing Liu

An-Qing Jiang

Jia-Jin Zheng

Ke-Han Yu

Wei Wei

Yu-Xiang Zheng

Rong-Jun Zhang

Song-You Wang

Hai-Bin Zhao

Osamu Yoshie

Young-Pak Lee

Cai-Zhuang Wang

David W. Lynch

Jun-Peng Guo

Liang-Yao Chen

Crossref

High photon-to-heat conversion efficiency in the wavelength region of 250–1200 nm based on a thermoelectric Bi2Te3 film structure

High photon-to-heat conversion efficiency in the wavelength region of 250–1200 nm based on a thermoelectric Bi2Te3 film structure

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