Persistent Ion Accumulation at Interfaces Improves the Performance of Perovskite Solar Cells
Joshua Kreß, Claudio Quarti, Qingzhi An, Sapir Bitton, Nir Tessler, David Beljonne, Yana Vaynzof
Abstract
which causes the band bending. Despite the presence of this high density of ionic defects, the electronic structure calculations show no sub-band-gap states (electronic traps) are formed due to a pronounced perovskite lattice reorganization. Our work demonstrates that ionic traps can have a positive impact on device performance of perovskite solar cells.
Topics & Concepts
Perovskite (structure)Ionic bondingBand bendingMaterials scienceChemical physicsBand gapIonHalideTrappingElectronic structureOptoelectronicsHysteresisChemistryCondensed matter physicsInorganic chemistryComputational chemistryCrystallographyPhysicsOrganic chemistryBiologyEcologyPerovskite Materials and ApplicationsSolid-state spectroscopy and crystallographyChalcogenide Semiconductor Thin Films