LAUSR

Combining excellent optoelectronic properties with the benefits of solution processability, metal-halide perovskites are promising materials for photovoltaic and light-emitting technologies. To facilitate the integration of perovskite thin films into optoelectronic devices, a need exists for simple and efficient fabrication methods. Here we present a template-stripping technique to produce ultra-flat and flexible perovskite thin films. We apply a one-step spin-coating procedure to produce high-quality CH3NH3PbBr3 perovskite thin films on top of ultra-flat silicon templates. These films can be mechanically cleaved from the template using a polymer adhesive to reveal the ultra-flat perovskite surfaces. We demonstrate how the flatness and flexibility of the template-stripped films enable new processing strategies based on dry interfacing, by interfacing them with plasmonic hole arrays. Moreover, we show that by using pre-patterned silicon templates, structured perovskite surfaces can be produced with feature sizes down to a micrometer.