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Title: Fabrication of polycrystalline Cu{sub 2}ZnSnSe{sub 4} layers with strongly preferential grain orientation via selenization of Sn/Cu/ZnSe(001)/GaAs(001) structures

We report on a simple approach for the fabrication of polycrystalline Cu{sub 2}ZnSnSe{sub 4} films on GaAs with strongly preferential grain orientation. Such layers are important for both fundamental spectroscopic investigations as well as studies of the impact of grain boundaries on the performance of solar cells. Cu{sub 2}ZnSnSe{sub 4} (CZTSe) layers were fabricated by growing a Sn/Cu/ZnSe(001) stack on a GaAs(001) substrate in a molecular-beam epitaxy system followed by selenization in a tube furnace. Raman spectroscopy as well as X-ray diffraction measurements combined with a microstructural investigation indicate the presence of the kesterite phase. Further, X-ray analysis such as rocking curves and ϕ-scans proves a preferential grain orientation of the obtained CZTSe films in all three dimensions.
Authors:
; ; ; ; ;  [1] ; ;  [2] ;  [3]
  1. Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe (Germany)
  2. Laboratory for Electron Microscopy, KIT, Karlsruhe (Germany)
  3. Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, 70565 Stuttgart, Germany and Light Technology Institute, KIT, Karlsruhe (Germany)
Publication Date:
OSTI Identifier:
22283099
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER COMPOUNDS; FABRICATION; GALLIUM ARSENIDES; GRAIN BOUNDARIES; GRAIN ORIENTATION; HETEROJUNCTIONS; LAYERS; MOLECULAR BEAM EPITAXY; NEUTRON DIFFRACTION; POLYCRYSTALS; RAMAN SPECTROSCOPY; SOLAR CELLS; SUBSTRATES; THIN FILMS; TIN COMPOUNDS; X-RAY DIFFRACTION; ZINC SELENIDES