KPFM surface photovoltage measurement and numerical simulation Clément Marchat, James P. Connolly, Jean-Paul Kleider, José Alvarez, Lejo J. Koduvelikulathu and Jean Baptiste Puel EPJ Photovolt., 10 (2019) 3 Published online: 06 June 2019 DOI: 10.1051/epjpv/2019002