Direct patterning of methylammonium lead bromide perovskites by thermal imprint

Abstract Promising new materials like solution-processable perovskites may provide devices with superior properties, e.g. for opto-electronics. For some applications patterning is required and nanoimprint as a solvent-free, mechanical shaping process has been identified to be particularly favorable this purpose. The current investigation refers the organic–inorganic perovskite methylammonium lead bromide (MAPbBr 3 ) related direct imprint under pressure temperature. Experiments single crystal polycrystalline layers of differing grain size indicate that large-grained starting layer offers optimum pre-conditions replication micro/nano-structures. aim present study develop physical understanding material. To such conception, analogies between thermoplastic polymers are sought, consequences resulting from differences in microscopic material response worked out. main aspect plastic deformation occurs due gliding on crystallographic glide planes, similar case metals. With < 100 > -oriented activates (110) 110 -type system, providing transport at 45° respect surface normal. preferential direction investigated by analyzing experiments partial complete filling cavities stamp used imprint. By considering geometric correlations during initial phase experimental results can understood. Beyond that, it turns out specific conditions shape grains controlled imprinted pattern. This ‘grain patterning’ provides unexpected, innovative prospects layers.