Selective reactivity-assisted sacrificial additive coating for surface passivation of wide bandgap perovskite solar cells with cesium tetrafluoroborate
Jaehyuk Koh, Daehan Kim, Sang Woo Park, Hyungjun Kim, Ki‐Ha Hong, Byungha Shin
Abstract
A novel method, named “selective reactivity-assisted sacrificial additive coating”, allowed the BF 4 − from the sacrificial additive to react selectively with the Cs + from the perovskite, forming CsBF 4 to passivate the A-site vacancy on the surface.
Topics & Concepts
PassivationMaterials sciencePerovskite (structure)CaesiumReactivity (psychology)CoatingBand gapSurface modificationNanotechnologyOptoelectronicsChemical engineeringInorganic chemistryChemistryCrystallographyLayer (electronics)EngineeringMedicinePathologyAlternative medicinePerovskite Materials and ApplicationsSolid-state spectroscopy and crystallographyConducting polymers and applications