Impact of Cation Multiplicity on Halide Perovskite Defect Densities and Solar Cell Voltages

• Published in: Journal of physical chemistry. C Vol. 124; no. 50; pp. 27333 - 27339
• Main Authors: Ledinský, Martin, Vlk, Aleš, Schönfeldová, Tereza, Holovský, Jakub, Aydin, Erkan, Dang, Hoang X, Hájková, Zdeňka, Landová, Lucie, Valenta, Jan, Fejfar, Antonín, De Wolf, Stefaan
• Format: Journal Article
• Language: English
• Published: American Chemical Society 17.12.2020
• Subjects: absorption; C: Energy Conversion and Storage; Energy and Charge Transport; cations; electric potential difference; iodides; lead; photoluminescence; solar cells

Metal-halide perovskites feature very low deep-defect densities, thereby enabling high operating voltages at the solar cell level. Here, by precise extraction of their absorption spectra, we find that the low deep-defect density is unaffected when cations such as Cs+ and Rb+ are added during the per...