Hydrogen states in mixed-cation CuIn(1−x)GaxSe2 chalcopyrite alloys : a combined study by first-principles density-functional calculations and muon-spin spectroscopyMarinopoulos, Apostolos G.; Vilao, Rui C.; Alberto, Helena V.; Ribeiro, E. F. M.; Gil, J. M.; Mengyan, P. W.; Goeks, M. R.; Kauk-Kuusik, Marit; Lord, J. S.Philosophical magazine2021 / p. 2412-2434 https://doi.org/10.1080/14786435.2021.1972178 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS 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