Local large temperature difference and ultra-wideband photothermoelectric response of the silver nanostructure film/carbon nanotube film heterostructure

Bocheng Lv, Yu Liu, Weidong Wu, Yan Xie, Jia-Lin Zhu, Yang Cao, Wanyun Ma, Ning Yang, Weidong Chu, Yi Jia, Jinquan Wei () and Jia-Lin Sun ()
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Bocheng Lv: Tsinghua University
Yu Liu: Fuzhou University
Weidong Wu: Tsinghua University
Yan Xie: Tsinghua University
Jia-Lin Zhu: Tsinghua University
Yang Cao: Beijing Information Science & Technology University
Wanyun Ma: Tsinghua University
Ning Yang: Institute of Applied Physics and Computational Mathematics
Weidong Chu: Institute of Applied Physics and Computational Mathematics
Yi Jia: China Academy of Space Technology
Jinquan Wei: Tsinghua University
Jia-Lin Sun: Tsinghua University

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Photothermoelectric materials have important applications in many fields. Here, we joined a silver nanostructure film and a carbon nanotube film by van der Waals force to form a heterojunction, which shows excellent photothermal and photoelectric conversion properties. The local temperature difference and the output photovoltage increase rapidly when the heterojunction is irradiated by lasers with wavelengths ranging from ultraviolet to terahertz. The maximum temperature difference reaches 215.9 K, which is significantly higher than that of other photothermoelectric materials reported in the literature. The photothermal and photoelectric responsivity depend on the wavelength of lasers, which are 175~601 K W-1 and 9.35~40.4 mV W-1, respectively. We demonstrate that light absorption of the carbon nanotube is enhanced by local surface plasmons, and the output photovoltage is dominated by Seebeck effect. The proposed heterostructure can be used as high-efficiency sensitive photothermal materials or as ultra-wideband fast-response photoelectric materials.

Date: 2022
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DOI: 10.1038/s41467-022-29455-6

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