A novel dimethylformamide (DMF) free bar-cast method to deposit organolead perovskite thin films with improved stability

Abstract

We report a solvent-free approach to synthesizing organolead perovskites by using solid state reactions to coat perovskite crystals onto Al₂O₃ or TiO₂ nanoparticles followed by addition of terpineol affording perovskite inks. We have bar cast these inks to produce photoactive perovskite thin films which are significantly more stable to humidity than solution-processed films. This new method also avoids the use of toxic DMF solvent.