Applied Physics Letters · 2011 · 205 citations · 14 references
EngineeringMaterials EngineeringMaterials ScienceElectronic MaterialsSemiconductor DevicesSemiconductor MaterialsCarrier TransportSemiconductor HeterostructuresSemiconductor InterfacesSemiconductor PhysicsSolar Cell MaterialsSolar CellsBand AlignmentBand OffsetsCarrier RecombinationCharge Carrier RecombinationCharge RecombinationConduction BandElectronic Structure AnalysisHeterojunction Solar Cells
The electronic structure of the CdS/Cu2ZnSnS4 (CZTS) heterojunction was investigated by direct and inverse photoemission. The effects of a KCN etch of the CZTS absorber prior to CdS deposition on the band alignment at the respective interface were studied. We find a “cliff”-like conduction band offset at the CdS/CZTS interface independent of absorber pretreatment and a significant etch-induced enhancement of the energetic barrier for charge carrier recombination across the CdS/CZTS interface.
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Thermally evaporated Cu2ZnSnS4 solar cells
Kai Wang, Oki Gunawan, Teodor K. Todorov et al. · Applied Physics Letters · 2010 · 646 citations