Confined and Chemically Flexible Grain Boundaries in Polycrystalline Compound Semiconductors (pages 992–998)
Daniel Abou-Ras, Sebastian S. Schmidt, Raquel Caballero, Thomas Unold, Hans-Werner Schock, Christoph T. Koch, Bernhard Schaffer, Miroslava Schaffer, Pyuck-Pa Choi and Oana Cojocaru-Mirédin
Version of Record online: 10 MAY 2012 | DOI: 10.1002/aenm.201100764
Grain boundaries in polycrystalline Cu(In,Ga)Se2 thin-film solar cells are confined to only about 1 nm in width and are chemically flexible. Measurements by electron energy-loss spectroscopy, electron holography for potential profiling, and by atom-probe tomography consistently show indications of atomic redistribution within the atomic planes closest to the grain boundary core.