Wearable Alternating Current Electroluminescent e‐Textiles with High Brightness Enabled by Fully Sprayed Layer‐By‐Layer Assembly

Abstract Textile‐based flexible alternating current electroluminescent devices have attracted extensive research interest due to their great potential in the fields of illumination and display, information interaction, smart wear, visual sensing, and trendy decoration. However, the challenge remains to easily and efficiently fabricate electroluminescent devices with high brightness and excellent durability. In this study, a fully sprayed method for fabricating electroluminescent devices on fabric is proposed. Based on the top‐emitting structure, light‐emitting e‐textiles with bright light emission are successfully prepared using highly conductive eutectic gallium–indium alloy and silver nanowires as the bottom and top electrodes, respectively, and high dielectric constant composites as the dielectric layer. Here, the brightness enhancement mechanism of high dielectric constant dielectric layers is explained for alternating current electroluminescence devices with top‐emitting structure. The devices have a brightness of up to 338.6 cd m −2 and are resistant to all forms of physical damage. This work may be a feasible path to simplify the process and reduce the cost, and may effectively promote the industrialization of wearable electroluminescent devices.