Investigation of the solar cell materials Cu(In,Ga)Se2 and Cu2ZnSnS4 with muon spin spectroscopy and density-functional calculationsVilao, Rui C.; Marinopoulos, Apostolos G.; dos Santos, Diego Garcia; Alberto, Helena Vieira; Gil, Joao Campos; Mengyan, Patrick W.; Kauk-Kuusik, Marit; Lord, James; Weidinger, AloisJournal of applied physics2024 / art. 055704 https://doi.org/10.1063/5.0205837