Title Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells
Authors Al-Ashouri, Amran ; Magomedov, Artiom ; Roß, Marcel ; Jošt, Marko ; Talaikis, Martynas ; Chistiakova, Ganna ; Bertram, Tobias ; Márquez, José A ; Köhnen, Eike ; Kasparavičius, Ernestas ; Levcenco, Sergiu ; Gil-Escrig, Lidón ; Hages, Charles J ; Schlatmann, Rutger ; Rech, Bernd ; Malinauskas, Tadas ; Unold, Thomas ; Kaufmann, Christian A ; Korte, Lars ; Niaura, Gediminas ; Getautis, Vytautas ; Albrecht, Steve
DOI 10.1039/c9ee02268f
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Is Part of Energy & environmental science.. Cambridge : Royal society of chemistry. 2019, vol. 12, iss. 11, p. 3356-3369.. ISSN 1754-5692. eISSN 1754-5706
Keywords [eng] monolayer ; perovskite ; tandem ; solar cells
Abstract [eng] The 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.
Published Cambridge : Royal society of chemistry
Type Journal article
Language English
Publication date 2019
CC license CC license description