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25 March 2013 Six not so easy pieces in intermediate band solar cell research
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The concept of "intermediate band solar cell" (IBSC) is, apparently, simple to grasp. However, since the idea was proposed, our understanding has improved and we feel now that we can explain better some concepts than we initially introduced. Clarifying these concepts is important, even if they are well-known for the advanced researcher, so that efforts can be driven in the right direction from start. The six pieces of this work are: Does a miniband need to be formed when the IBSC is implemented with quantum dots?; What are the problems of each of the main practical approaches that exist today? What are the simplest experimental techniques to demonstrate whether an IBSC is working as such or not? What is the issue with the absorption coefficient overlap? and Mott's transition? What the best system would be, if any?
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A. Martí, E. Antolín, P. García-Linares, I. Ramiro, I. Artacho, E. López, E. Hernández, M. J. Mendes, A. Mellor, I. Tobías, D. Fuertes Marrón, C. Tablero, A. B. Cristóbal, C. G. Bailey, M. Gonzalez, M. Yakes, M. P. Lumb, R. Walters, and A. Luque "Six not so easy pieces in intermediate band solar cell research", Proc. SPIE 8620, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II, 86200J (25 March 2013);

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