Transparent dynamic infrared emissivity regulators

Yan Jia, Dongqing Liu (), Desui Chen, Yizheng Jin, Chen Chen, Jundong Tao, Haifeng Cheng (), Shen Zhou, Baizhang Cheng, Xinfei Wang, Zhen Meng and Tianwen Liu
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Yan Jia: National University of Defense Technology
Dongqing Liu: National University of Defense Technology
Desui Chen: Zhejiang University
Yizheng Jin: Zhejiang University
Chen Chen: National University of Defense Technology
Jundong Tao: National University of Defense Technology
Haifeng Cheng: National University of Defense Technology
Shen Zhou: National University of Defense Technology
Baizhang Cheng: National University of Defense Technology
Xinfei Wang: National University of Defense Technology
Zhen Meng: National University of Defense Technology
Tianwen Liu: National University of Defense Technology

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Dynamic infrared emissivity regulators, which can efficiently modulate infrared radiation beyond vision, have emerged as an attractive technology in the energy and information fields. The realization of the independent modulation of visible and infrared spectra is a challenging and important task for the application of dynamic infrared emissivity regulators in the fields of smart thermal management and multispectral camouflage. Here, we demonstrate an electrically controlled infrared emissivity regulator that can achieve independent modulation of the infrared emissivity while maintaining a high visible transparency (84.7% at 400–760 nm). The regulators show high degree of emissivity regulation (0.51 at 3–5 μm, 0.41 at 7.5–13 μm), fast response ( 104 cycles). The infrared emissivity regulation is attributed to the modification of the carrier concentration in the surface depletion layer of aluminum-doped zinc oxide nanocrystals. This transparent infrared emissivity regulator provides opportunities for applications such as on-demand smart thermal management, multispectral displays, and adaptive camouflage.

Date: 2023
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DOI: 10.1038/s41467-023-40902-w

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