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Self-regulation mechanism for charged point defects in hybrid halide perovskites
- Source :
- Angewandte Chemie International Edition 54, 1791 (2015)
- Publication Year :
- 2014
-
Abstract
- Hybrid halide perovskites such as methylammonium lead iodide (CH3NH3PbI3) exhibit unusually low free carrier concentrations despite being processed at low-temperatures from solution. We demonstrate, through quantum mechanical calculations, that the origin of this phenomenon is a prevalence of ionic over electronic disorder in stoichiometric materials. Schottky defect formation provides a mechanism to self-regulate the concentration of charge carriers through ionic compensation of charged point defects. The equilibrium charged vacancy concentration is predicted to exceed 0.4% at room temperature. This behaviour, which goes against established defect conventions for inorganic semiconductors, has implications for photovoltaic performance.
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Angewandte Chemie International Edition 54, 1791 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1411.7606
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1002/anie.201409740