Unambiguous Determination of Local Orientations of Polycrystalline CuInSe2 Thin Films via Dictionary‐Based Indexing. Issue 7 (26th March 2019)

• Record Type: Journal Article
• Authors: De Graef, Marc; Lenthe, William C.; Schäfer, Norbert; Rissom, Thorsten; Abou‐Ras, Daniel
• Is Part Of: Physica status solidi. Volume 13:Issue 7(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-03-26
• Subjects: CuInSe2 -- dictionary‐based indexing -- electron backscatter diffraction -- pseudosymmetry -- solar cells; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201900032
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : The present work describes the approach of how to determine local orientations in individual CuInSe2 grains from electron‐backscatter diffraction (EBSD) data, in spite of the very small deviation (0.3%) of the ratio of lattice constants of the tetragonal crystal structure, c / a, from the value in the pseudocubic case, 2. A dictionary‐based indexing algorithm is applied on each EBSD pattern, determining unambiguously the corresponding CuInSe2 crystal orientation of the tetragonal structure. The approach provided in the present work can be used to improve the studies of microstructure–property relationships in various relevant photovoltaic material systems with similar pseudosymmetrical crystal structures, such as kesterite‐type or halide‐perovskite thin films. Abstract : An approach is described on how to determine local orientations in individual CuInSe2 grains from electron‐backscatter diffraction data via a dictionary‐based indexing algorithm, in spite of the very small deviation (0.3%) of the ratio of lattice constants of the tetragonal crystal structure, c / a, from the value in the pseudocubic case, 2.