Al-Ashouri, AmranMagomedov, ArtiomRoß, MarcelJošt, MarkoTalaikis, MartynasChistiakova, GannaBertram, TobiasMárquez, José A.Köhnen, EikeKasparavičius, ErnestasLevcenco, SergiuGil-Escrig, LidónHages, Charles J.Schlatmann, RutgerRech, BerndMalinauskas, TadasUnold, ThomasKaufmann, Christian A.Korte, LarsNiaura, GediminasGetautis, VytautasAlbrecht, Steve2021-11-162021-11-162019-10-021754-5692https://depositonce.tu-berlin.de/handle/11303/13888http://dx.doi.org/10.14279/depositonce-12661The rapid rise of perovskite solar cells (PSCs) is increasingly limited by the available charge-selective contacts. This work introduces two new hole-selective contacts for p–i–n PSCs that outperform all typical p-contacts in versatility, scalability and PSC power-conversion efficiency (PCE). The molecules are based on carbazole bodies with phosphonic acid anchoring groups and can form self-assembled monolayers (SAMs) on various oxides. Besides minimal material consumption and parasitic absorption, the self-assembly process enables conformal coverage of arbitrarily formed oxide surfaces with simple process control. The SAMs are designed to create an energetically aligned interface to the perovskite absorber without non-radiative losses. For three different perovskite compositions, one of which is prepared by co-evaporation, we show dopant-, additive- and interlayer-free PSCs with stabilized PCEs of up to 21.1%. Further, the conformal coverage allows to realize a monolithic CIGSe/perovskite tandem solar cell with as-deposited, rough CIGSe surface and certified efficiency of 23.26% on an active area of 1 cm2. The simplicity and diverse substrate compatibility of the SAMs might help to further progress perovskite photovoltaics towards a low-cost, widely adopted solar technology.en621 Angewandte PhysikPerovskite silicon tandem solar cellsmultijunctioncharacterizationlightmanagementopticsPerowskite-Silizium-Tandem-SolarzellenMehrfachsolarzelleCharakterisierungOptikArticle1754-5706