physica status solidi (RRL) - Rapid Research Letters · 2016 · 1.5K citations · 14 references
Natural SciencesMaterials EngineeringMaterials ScienceElectronic MaterialsEnergy MaterialsSemiconductor MaterialsDopingElectrical CharacterizationIon-conducting MaterialsSolar Cell MaterialsSolar CellsSolar Photovoltaic SystemsAlkali Metal ChemistryAlkali TreatmentDiode Circuit AnalysisSecondary Ion Mass SpectrometrySolar Cell CharacterizationSolar Cell Device Physics
We report on the use and effect of the alkali elements rubidium and caesium in the place of sodium and potassium in the alkali post deposition treatment (PDT) as applied to Cu(In,Ga)Se 2 (CIGS) solar cell absorbers. In order to study the effects of the different alkali elements, we have produced a large number of CIGS solar cells with high efficiencies resulting in a good experimental resolution to detect even small differences in performance. We examine the electrical device parameters of these fully functional devices and observe a positive trend in the I – V parameters when moving from devices without PDT to KF‐, RbF‐, and eventually to CsF‐PDT. A diode analysis reveals an improved diode quality for cells treat‐ed with heavier alkalis. Furthermore, secondary ion mass spectrometry (SIMS) measurements reveal a competitive mechanism induced within the class of alkali elements in the CIGS absorber induced by the alkali post deposition treatment. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)
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Philip Jackson, Dimitrios Hariskos, Roland Wüerz et al. · physica status solidi (RRL) - Rapid Research Letters · 2014 · 517 citations