Comparison of techniques for strain measurements in CuInSe2 absorber layers of thin-film solar cells

1. Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH, Hahn-Meitner-Platz 1, 14109 Berlin, Germany 2. Freie Universitaet Berlin, Institute of Geological Sciences, Malteserstr. 74-100, 12249 Berlin, Germany 3. Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, U.K. 4. European Synchrotron Radiation Facility, BP 220, Grenoble Cedex, France 5. Federal Institute for Materials Research and Testing, Richard-Willstatter-Str. 11, 12205 Berlin, Germany