Mixed Chalcogenides Nanoflakes’ Infrared Cutting Effect: Utilization in Thermal Soothing Electrochromic Goggles

Abstract

A highly flexible prototype goggle with heat filtering capabilities has been built and demonstrated to have a heat soothing effect achieved through electrochromic modulation in the near-infrared (NIR) region. A flexible electrochromic device is designed by the doping of a WS2/WO3 mixture, in P3HT-EV-based electrochromic active materials, which makes the devices switch in ∼1 s, making it one of the fastest devices in the family. The fully flexible NIR cutting electrochromic device (flex-NIR cutting-ECD) shows high NIR shielding by maintaining a temperature difference of up to 6 °C and cuts more than 15% of the heat when in the ON state. The device shows an optical modulation of up to 60% and a photopic coloration effeciency of 34 cm2/C along with a cyclic staibility of more than 100 toggles. The real world applicability has been demonstrated by making mini-goggles which change color between blue and magenta and cut heat making a way for a heat-calming eye-care gadget with bendable and twistable properties. © 2024 American Chemical Society.