Applied Physics Letters · 2013 · 21 citations · 22 references
Materials ScienceKesterite Cu2znsns4Ii-vi SemiconductorNanocrystalline MaterialEngineeringNanosheetTransition Metal ChalcogenidesNanomaterialsNanotechnologyNanoelectronicsLattice PositionsApplied PhysicsX-ray AbsorptionSemiconductor MaterialChemistryThin FilmsCu2znsns4 NanoparticlesCu2sns3 Nanoparticles
Lattice positions of Sn in kesterite Cu2ZnSnS4 and Cu2SnS3 nanoparticles and thin films were investigated by XANES (x-ray absorption near edge structure) analysis at the S K-edge. XANES spectra were analyzed by comparison with simulations taking into account anti-site defects and vacancies. Annealing of Cu2ZnSnS4 nanoparticle thin films led to a decrease of Sn at its native and defect sites. The results show that XANES analysis at the S K-edge is a sensitive tool for the investigation of defect sites, being critical in kesterite thin film solar cells.
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