0000000000082197

AUTHOR

Anders Hagfeldt

showing 2 related works from this author

Watching Ions Move: Scanning Probe Microscopy on Perovskite Solar Cells

2018

Scanning probe microscopyMaterials sciencebusiness.industryOptoelectronicsbusinessIonPerovskite (structure)Proceedings of the nanoGe Fall Meeting 2018
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How the formation of interfacial charge causes hysteresis in perovskite solar cells

2018

In this study, we discuss the underlying mechanism of the current-voltage hysteresis in a hybrid lead-halide perovskite solar cell. We have developed a method based on Kelvin probe force microscopy that enables mapping charge redistribution in an operating device upon a voltage- or light pulse with sub-millisecond resolution. We observed the formation of a localized interfacial charge at the anode interface, which screened most of the electric field in the cell. The formation of this charge happened within 10 ms after applying a forward voltage to the device. After switching off the forward voltage, however, these interfacial charges were stable for over 500 ms and created a reverse electri…

Materials scienceIonic bondingPerovskite solar celllead iodide02 engineering and technology010402 general chemistry01 natural sciencesIonforce microscopyElectric fieldEnvironmental ChemistryKelvin probe force microscopeion migrationRenewable Energy Sustainability and the Environmentnanoscaledynamics021001 nanoscience & nanotechnologyPollution0104 chemical sciencesAnodeNuclear Energy and EngineeringChemical physicsCharge carrierlight0210 nano-technologyVoltageEnergy & Environmental Science
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