ACS Energy Letters · 2020 · 208 citations · 41 references
EngineeringMaterials EngineeringMaterials ScienceElectronic MaterialsSemiconductor DevicesSemiconductor MaterialsCoatingsPhotovoltaic DevicesPhotovoltaic MaterialsSemiconductor SurfacesSolar Cell MaterialsSolar CellsEnergy Conversion EfficiencyPassivationPerovskite Solar CellsPower ConversionPower Conversion EfficiencySilicon Solar CellsSurface Passivation LayersTandem Solar Cells
In this work, we report perovskite solar cells in the planar p–i–n configuration based on single-step, anti-solvent-free, low-temperature (70 °C) slot-die-coated methylammonium lead tri-iodide (MAPbI3). The devices are fabricated on hydrophobic poly(triarylamine) (PTAA) surfaces, using key strategies such as solvent engineering, enhanced ink–substrate dynamics, and surface passivation, enabling a power conversion efficiency (PCE) of 21.8%. We also adapted the technique to achieve the first slot-die-coated perovskite/silicon monolithic 2-terminal tandems, achieving a PCE of 23.8% utilizing a textured silicon bottom cell.
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