Enhanced stability in CH₃NH₃PbI₃ hybrid perovskite from mechano-chemical synthesis: structural, microstructural and optoelectronic characterization.

ABSTRACT: Among the hybrid organic-inorganic perovskites MAPbX₃ (MA: methyl-ammonium CH₃-NH₃⁺, X = halogen), the triiodide specimen (MAPbI₃) is still the material of choice for solar energy applications. Although it is able to absorb light above its 1.6 eV bandgap, its poor stability in humid air atmosphere has been a major drawback for its use in solar cells. However, we discovered that this perovskite can be prepared by ball milling in a straightforward way, yielding specimens with a superior stability. This fact allowed us to take atomic-resolution STEM images for the first time, with sufficient quality to unveil microscopic aspects of this material. We demonstrated full Iodine content, which might be related to the enhanced stability, in a m

SUBMITTER: Lopez CA 

PROVIDER: S-EPMC7343856 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature