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Related Experiment Video

Updated: Oct 17, 2025

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Self-Driven Infrared Electrochromic Device with Tunable Optical and Thermal Management.

Hui Gong1, Jingru Ai1, Wanzhong Li1

  • 1Key Laboratory for New Functional Materials of Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, P. R. China.

ACS Applied Materials & Interfaces
|October 12, 2021
PubMed
Summary

Researchers developed a flexible, self-driven electrochromic device (ECD) for infrared (IR) applications. This low-energy device achieves significant IR reflectance contrast and temperature modulation without external power, offering potential for dynamic camouflage and thermal control.

Keywords:
electrochromic deviceoptical and thermal managementpolyanilineself-drivenvariable infrared reflectivity

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Infrared electrochromic devices (IR-ECDs) offer tunable optical and thermal modulation.
  • Current IR-ECDs often require continuous energy supply, limiting their applications.
  • Developing low-energy consumption IR-ECDs is crucial for advanced functionalities.

Purpose of the Study:

  • To construct a flexible, self-driven IR-ECD for low-energy optical and thermal management.
  • To demonstrate the device's ability to modulate IR reflectance and surface temperature without external power.
  • To explore applications in military camouflage and commercial thermal control.

Main Methods:

  • Fabrication of a flexible self-driven IR-ECD utilizing a polyaniline cathode and aluminum anode.
  • Measurement of IR reflectance contrast and coloration efficiency.
  • Assessment of surface temperature modulation and device reversibility using a solar cell.

Main Results:

  • A built-in potential difference of 1.36 V enabled self-driven operation.
  • Achieved an IR reflectance contrast exceeding 20% at 1500 nm.
  • Demonstrated a maximum surface temperature modulation of 5.6 °C and high coloration efficiency (93.6 cm2 C-1).

Conclusions:

  • The developed self-driven IR-ECD offers efficient optical and thermal modulation with low energy consumption.
  • The device exhibits good reversibility and stability, powered by a solar cell.
  • This work provides a new approach for advanced self-driven IR-ECDs in dynamic camouflage and thermal management.