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Jongyeop An1 Ye Rim Lee1 Byung Yang Lee1

1, Korea University, Seoul, , Korea (the Republic of)

Recent developments of artificial skins and wearable devices demand soft actuating materials with high flexibility and yield stress. Among these materials, dielectric elastomer actuators (DEA) show flexibility, light weight, thin structure and high mechanical strain, making them strong candidates for future smart materials. Recently, reports on imparting new properties to DEAs such as electroluminescence have been reported. However, the luminance show values around a few cd/m2 which are still weak for daily applications. Here, we report an electroluminescent DEA (ELDEA) combining silver nanowire (AgNW) and carbon nanotube (CNT) hybrid electrode on one side and eutectic gallium indium (eGaIn) electrode on the other side. In particular, eGaIn material is advantageous in imparting self-healing properties to DEA electrodes. Our structure enabled transparency on one electrode and high reflectance on the other side of the electrodes. This resulted in ELDEAs with enhanced electroluminescence and strain values compared to previous reports. We expect that our ELDEAs will be useful in future smart wearable devices and artificial skins where high luminance and mechanical strains are desired at the same time.

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