Beneficial impact of a thin tunnel barrier in quantum well intermediate-band solar cellNicolas Cavassilas, Daniel Suchet, Amaury Delamarre, Fabienne Michelini, Marc Bescond, Yoshitaka Okada, Masakazu Sugiyama and Jean-Francois GuillemolesEPJ Photovolt., 9 (2018) 11DOI: https://doi.org/10.1051/epjpv/2018009