Mid-infrared electrochromics enabled by intraband modulation in carbon nanotube networks

Lynch, Peter J, Tripathi, Manoj, Amorim Graf, Aline, Ogilvie, Sean P, Large, Matthew J, Salvage, Jonathan and Dalton, Alan B (2023) Mid-infrared electrochromics enabled by intraband modulation in carbon nanotube networks. ACS Applied Materials & Interfaces. pp. 1-9. ISSN 1944-8244

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Tuneable infrared properties, such as transparency and emissivity, are highly desirable for a range of applications, including thermal windows and emissive cooling. Here, we demonstrate the use of carbon nanotube networks spray-deposited onto an ionic liquid-infused membrane to fabricate devices with electrochromic modulation in the mid-infrared spectrum, facilitating control of emissivity and apparent temperature. Such modulation is enabled by intraband transitions in unsorted single-walled carbon nanotube networks, allowing the use of scalable nanotube inks for printed devices. These devices are optimized by varying film thickness and sheet resistance, demonstrating the emissivity modulation (from ∼0.5 to ∼0.2). These devices and the understanding thereof open the door to selection criteria for infrared electrochromic materials based on the relationship between band structure, electrochemistry, and optothermal properties to enable the development of solution-processable large-area coatings for widespread thermal management applications.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 21 Feb 2023 10:39
Last Modified: 27 Apr 2023 12:58
URI: http://sro.sussex.ac.uk/id/eprint/110818

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