Dresden 2020 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 41: Perovskite and photovoltaics III (joint session HL/CPP)

HL 41.7: Vortrag

Mittwoch, 18. März 2020, 11:30–11:45, POT 251

Enabling Versatile High-Efficiency Perovskite Photovoltaics by Charge-Selective Contact Design — •Amran Al-Ashouri¹, Artiom Magomedov², Marcel Roß¹, Marko Jošt¹, Martynas Talaikis³, Ganna Christiakova¹, José M. Prieto¹, Eike Köhnen¹, Ernestas Kasparavičius², Bernd Rech¹, Tadas Malinauskas², Thomas Unold¹, Lars Korte¹, Gediminas Niaura³, Vytautas Getautis², and Steve Albrecht¹ — ¹HZB, Berlin, Germany — ²KTU, Kaunas, Lithuania — ³FTMC, Vilnius, Lithuania

By establishing a simple, low-cost and robust perovskite solar cell device structure that employs self-assembled monolayers (SAMs) [1], we realized power conversion efficiencies of over 21 % for single junction cells, over 23 % for CIGSe/perovskite and well over 27 % for silicon/perovskite tandem solar cells. Using time-resolved and absolute photoluminescence spectroscopy together with an analysis of the energetic alignment between hole-selective contact and absorber, we identify design guidelines for an hole-selective interface without non-radiative recombination losses. A SAM model system further allows to study voltage and fill factor losses for an increased understanding of how to experimentally explore pathways towards theoretical efficiency limits.
[1] Al-Ashouri et al. Energy Environ. Sci. 2019, 12, 3356