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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
(a) Real-time variation of the reflectance during the course of deposition of the AR layer (t = 3 to 12 min). (b) Real-time variation of the reflectance of the CIGS structure with increased thickness of the AR layer.