Potassium Acetate Passivated SnO<sub>2</sub> Interface for High‐Efficiency Two‐Step Deposited Perovskite Solar Cells
Wenqiang Li, Shuo Ding, Chunyan Wu, Lei Qian, Chaoyu Xiang
Abstract
Abstract The quality of the tin dioxide interface has an important impact on the performance of perovskite solar cells. Herein, a facile potassium acetate strategy to effectively treat the SnO 2 /perovskite interface and enhance the film quality of perovskite crystals is used. The defect density at the interface can be reduced, thereby suppressing the nonradiative recombination of excitons. Enhanced performance of the two‐step deposited perovskite device is obtained with an open‐circuit voltage ( V OC ) of 1.173 V, a fill factor of 78.31%, and a power conversion efficiency of 23.63%.
Topics & Concepts
Perovskite (structure)Energy conversion efficiencyMaterials sciencePotassiumExcitonTinInterface (matter)OptoelectronicsOpen-circuit voltageChemical engineeringVoltageElectrical engineeringMetallurgyComposite materialQuantum mechanicsPhysicsCapillary actionCapillary numberEngineeringPerovskite Materials and ApplicationsChalcogenide Semiconductor Thin FilmsQuantum Dots Synthesis And Properties