Mid-Infrared Electrochromics Enabled by Intraband Modulation in Carbon Nanotube Networks

Peter J. Lynch, Manoj Tripathi, Aline Amorim Graf, Sean P. Ogilvie, Matthew J. Large, Jonathan Salvage, Alan B. Dalton

Research output: Contribution to journalArticlepeer-review


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.
Original languageEnglish
Pages (from-to)11225-11233
Number of pages9
JournalACS Applied Materials and Interfaces
Issue number8
Publication statusPublished - 17 Feb 2023

Bibliographical note

ACKNOWLEDGMENTS: The authors would like to thank Advanced Materials Development Ltd. and University of Sussex strategic development fund for financial support.


  • General Materials Science
  • liquid processing
  • emissivity modulation
  • carbon nanotubes
  • electrochromics
  • optoelectronics


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