Mixed Chalcogenides\nNanoflakes’ Infrared Cutting\nEffect: Utilization in Thermal Soothing Electrochromic Goggles

A highly flexible prototype goggle with heat filtering\ncapabilities\nhas been built and demonstrated to have a heat soothing effect achieved\nthrough electrochromic modulation in the near-infrared (NIR) region.\nA flexible electrochromic device is designed by the doping of a WS<sub>2</sub>/WO<sub>3</sub> mixture, in P3HT-EV-based electrochromic active\nmaterials, which makes the devices switch in ∼1 s, making it\none of the fastest devices in the family. The fully flexible NIR cutting\nelectrochromic device (flex-NIR cutting-ECD) shows high NIR shielding\nby maintaining a temperature difference of up to 6 °C and cuts\nmore than 15% of the heat when in the ON state. The device shows an\noptical modulation of up to 60% and a photopic coloration effeciency\nof 34 cm<sup>2</sup>/C along with a cyclic staibility of more than\n100 toggles. The real world applicability has been demonstrated by\nmaking mini-goggles which change color between blue and magenta and\ncut heat making a way for a heat-calming eye-care gadget with bendable\nand twistable properties.