biostudies-literatureUnknown8(1)Dobrovolsky ASolution-processed organometal halide perovskites are hybrid crystalline semiconductors highly interesting for low-cost and efficient optoelectronics. Their properties are dependent on the crystal structure. Literature shows a variety of crystal phase transition temperatures and often a spread of the transition over tens of degrees Kelvin. We explain this inconsistency by demonstrating that the temperature of the tetragonal-to-orthorhombic phase transition in methylammonium lead triiodide depends on the concentration and nature of local defects. Phase transition in individual nanowires was studied by photoluminescence microspectroscopy and super-resolution imaging. We propose that upon cooling from 160 to 140 K, domains of the crystal containing fewer defects stay in the tetragonal phase lNature communications34https://www.ebi.ac.uk/biostudies/studies/S-EPMC5484711biostudies-literatureDefect-induced local variation of crystal phase transition temperature in metal-halide perovskites.PMC5484711Dobrovolsky AYartsev AUnger ELScheblykin IGMerdasa AfalseDefect-induced local variation of crystal phase transition temperature in metal-halide perovskites.Solution-processed organometal halide perovskites are hybrid crystalline semiconductors highly interesting for low-cost and efficient optoelectronics. Their properties are dependent on the crystal structure. Literature shows a variety of crystal phase transition temperatures and often a spread of the transition over tens of degrees Kelvin. We explain this inconsistency by demonstrating that the temperature of the tetragonal-to-orthorhombic phase transition in methylammonium lead triiodide depends on the concentration and nature of local defects. Phase transition in individual nanowires was studied by photoluminescence microspectroscopy and super-resolution imaging. We propose that upon cooling from 160 to 140 K, domains of the crystal containing fewer defects stay in the tetragonal phase l2017-01-01T00:00:00Z2017 Jun2025-04-22T16:42:54.683Z2019-03-27T02:48:31ZS-EPMC54847112865259710.1038/s41467-017-00058-w