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Semi-Transparent Perovskite Solar Cells with ITO Directly Sputtered on Spiro-OMeTAD for Tandem Applications

: Bett, Alexander Jürgen; Winkler, Kristina; Bivour, Martin; Cojocaru, Ludmila; Kabakli, Özde; Schulze, Patricia; Siefer, Gerald; Tutsch, Leonard; Hermle, Martin; Glunz, Stefan W.; Goldschmidt, Jan Christoph

Volltext urn:nbn:de:0011-n-5782615 (1.5 MByte PDF)
MD5 Fingerprint: 4e16c6581c67a858c9243926b19786cf
Erstellt am: 29.2.2020

ACS applied materials & interfaces 11 (2019), Nr.49, S.45796-45804
ISSN: 1944-8244
ISSN: 0013-936X
ISSN: 1944-8252
European Commission EC
H2020-Low Carbon Energy - New knowledge and technologies; 641023; Nano-Tandem
Nanowire based Tandem Solar Cells
Bundesministerium fur Wirtschaft und Energie BMWi (Deutschland)
0324037A; PersiST
Perowskit-Silizium Tandemsolarzellen
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ISE ()
Photovoltaik; Neuartige Photovoltaik-Technologien; Farbstoff- und Perowskitsolarzellen; Tandemsolarzellen auf kristallinem Silicium

Perovskite silicon tandem solar cells have the potential to overcome the efficiency limit of single-junction solar cells. For both monolithic and mechanically stacked tandem devices, a semi-transparent perovskite top solar cell, including a transparent contact, is required. Usually, this contact consists of a metal oxide buffer layer and a sputtered transparent conductive oxide. In this work, semi-transparent perovskite solar cells in the regular n–i–p structure are presented with tin-doped indium oxide (ITO) directly sputtered on the hole conducting material Spiro-OMeTAD. ITO process parameters such as sputter power, temperature, and pressure in the chamber are systematically varied. While a low temperature of 50 °C is crucial for good device performance, a low sputter power has only a slight effect, and an increased chamber pressure has no influence on device performance. For the 5 × 5 mm2 perovskite cell with a planar front side, a 105 nm thick ITO layer with a sheet resistance of 44 Ω sq–1 allowing for the omission of grid fingers and a MgF2 antireflection coating are used to improve transmission into the solar cells. The best device achieved an efficiency of 14.8%, which would result in 24.2% in a four-terminal tandem configuration.