Enhancement of the Electroluminescence and Strain Properties of Dielectric Elastomeric Actuators Using Liquid Metal Reflectors

We report on the enhancement of the light-emitting and mechanical performance of multifunctional dielectric elastomeric actuators by combining liquid eutectic gallium indium metal with a stretchable and transparent hybrid electrode composed of silver nanowires (AgNWs) and carbon nanotubes (CNTs). The device shows improved optical properties, electrical conductivity, and stability for electroluminescent dielectric elastomer actuators compared with previous works. Combining single-walled CNTs (SWCNTs) with AgNWs impeded the chemical reaction between the liquid metal and AgNWs, resulting in a more stable operation of the device. The maximum luminance and maximum strain of the electroluminescent dielectric elastomer actuator increased by 50% (from 300 to 450 cd m(-2)) and 44% (from 85 to 122%), respectively.