CH3NH3PbI3 perovskite single crystals: surface photophysics and their interaction with the environment. Issue 12 (2nd October 2015)

• Record Type: Journal Article
• Authors: Grancini, G.; D'Innocenzo, V.; Dohner, E. R.; Martino, N.; Srimath Kandada, A. R.; Mosconi, E.; De Angelis, F.; Karunadasa, H. I.; Hoke, E. T.; Petrozza, A.
• Is Part Of: Chemical science. Volume 6:Issue 12(2015:Dec.)
• Page Start: 7305
• Page End: 7310
• Publication Date: 2015-10-02
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5sc02542g
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : Structural inhomogeneity on a micrometer-scale across a CH3 NH3 PbI3 single crystal is responsible for a local modulation of the optical band gap, which is also highly sensitive to humidity. Abstract : Here we identify structural inhomogeneity on a micrometer scale across the surface of a CH3 NH3 PbI3 perovskite single crystal. At the crystal edge a local distortion of the crystal lattice is responsible for a widening of the optical bandgap and faster photo-carrier recombination. These effects are inherently present at the edge of the crystal, and further enhanced upon water intercalation, as a preliminary step in the hydration of the perovskite material.