A stretchable translucent conductive film based on polymer microspheres lithography technology

摘要

Transparent and translucent conductor has played an important role in various of photoelectric device electrodes, including photovoltaics (PVs), light-emitting diodes (LEDs), liquid-crystal displays (LCDs), touch-screen panels (TSPs), and radiofrequency identification (RFID) and so on [1], [2]. Some conductive oxides are transparent but do not stretchable. We have confirmed a method based on polystyrene (PS) microspheres lithography technology to obtain a stretchable transparent conductive film. The homogeneous mono-layer PS microstructure arrays were self-assembled on surface of modified polydimethylsiloxane (PDMS) film, and then the size and spacing distance of the microspheres were adjusted by plasma etching technology to obtain non-closed PS arrays, and the magnetron sputtering technology was used to deposit a layer of conductive metal on the etched microsphere arrays. The stretchable translucent conductive films show relatively high transmittance (53% at 550 nm), and good electrical stability under stretching conditions. They also posses better conformability and conformal on complex curve surfaces than conventional bendable transparent conductive films, and present excellent potential application in flexible electronic and biomedicine fields.