Carlos Portillo received the Dipl. Ing. degree in electrical engineering in the field of control theory from Universidad Católica del Norte, Antofagasta, Chile, in 2007 and the Ph.D. degree in applied physics in the field of crystalline silicon solar cells from the Faculty of Physics and Mathematics, University of Chile, Santiago, Chile, in 2012. He is currently an Associate Professor in the Faculty of Engineering, University of Antofagasta and a Researcher at the Center for energy development in the area of PV materials and specialist in theoretical solid-state spectroscopy .