4.8 Article

Facile Fabrication of Titanium Nitride Nanoring Broad-Band Absorbers in the Visible to Near-Infrared by Shadow Sphere Lithography

期刊

ACS APPLIED MATERIALS & INTERFACES
卷 15, 期 2, 页码 3266-3273

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c17875

关键词

refractory plasmonics; broad-band absorber; large-scale fabrication; shadow sphere lithography; metasurface

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This study presents a titanium nitride nanoring broad-band absorber that exhibits over 95% average absorption in the visible and near-infrared regions through shadow sphere lithography. The nanoring absorber demonstrates significantly higher temperature increase compared to flat film under light irradiation. These large-scale and broad-band absorbers show potential applications in solar energy conversion devices.
Plasmonic broad-band absorbers have received much attention because of their high absorption and potential applications for light-absorbing devices such as thermophotovoltaics, solar energy harvesting, and thermal emitters. However, the fabrication of complex structures in a large area and thermostability remains a great challenge. Here, we report a titanium nitride nanoring broad-band absorber that has over 95% average absorption in the visible and near-infrared regions (400-900 nm). Nanoring structures in a large area (inch2) are fabricated by shadow sphere lithography, which can innovatively increase fabrication efficiency. The nanoring absorber showed over 2.3 times higher-temperature increases than flat film under the irradiation of light. These large-scale and broad-band absorbers have potential applications for solar energy conversion devices such as thermophotovoltaics and photothermal devices.

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