Size-dependent phase transition in methylammonium lead iodide perovskite microplate crystals.

ABSTRACT: Methylammonium lead iodide perovskite has attracted considerable recent interest for solution processable solar cells and other optoelectronic applications. The orthorhombic-to-tetragonal phase transition in perovskite can significantly alter its optical, electrical properties and impact the corresponding applications. Here, we report a systematic investigation of the size-dependent orthorhombic-to-tetragonal phase transition using a combined temperature-dependent optical, electrical transport and transmission electron microscopy study. Our studies of individual perovskite microplates with variable thicknesses demonstrate that the phase transition temperature decreases with reducing microplate thickness. The sudden decrease of mobility around phase transition temperature and the presence o

SUBMITTER: Li D 

PROVIDER: S-EPMC4844678 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature