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Updated: Feb 25, 2026
Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
Published on: March 19, 2017
CH3NH3PbI3 perovskite single crystals: surface photophysics and their interaction with the environment
G Grancini1, V D'Innocenzo1,2, E R Dohner3
1Center for Nano Science and Technology@Polimi , Istituto Italiano di Tecnologia , via Giovanni Pascoli 70/3 , 20133 , Milan , Italy . Email: giulia.grancini@epfl.ch ;
Abstract:
Here we identify structural inhomogeneity on a micrometer scale across the surface of a CH3NH3PbI3 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.
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