Berlin 2015 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 61: Posters III (Organic-inorganic perovskite semiconductors; Organic photovoltaics and electronics; Photovoltaics; Energy science; New materials and concepts)
HL 61.6: Poster
Wednesday, March 18, 2015, 15:00–20:00, Poster F
Improved interfaces in solution processed perovskite solar cells — •Florian Mathies1,3, Julian Heußer3,4, Aina Quintilla1, Guillaume Gomard1, Norman Mechau1,3, and Uli Lemmer1,2 — 1Light Technology Institute, Karlsruhe Institute of Technology, Germany — 2Institute of Microstructure Technology, Karlsruhe Institute of Technology, Germany — 3InnovationLab, Heidelberg, Germany — 4Kirchhoff-Institute for Physics, University Heidelberg, Germany
Perovskite semiconductor materials promise to have a massive impact in the field of photovoltaics. Perovskite solar cells with efficiencies up to 19% have been recently fabricated, demonstrating their capability to compete with state-of-the-art silicon solar cells.
A critical point for the electrical performance in perovskite solar cells is the perovskite/metal oxide blocking layer interface. Consequently, we investigated different metal oxides (TiO2, ZnO, AZO and ZTO) with certain interfacial geometries, ranging from planar to nano- or mesoporous, with the perovskite layer. To make such solar cells compatible with flexible substrates and several industrially-relevant printing processes for a wide range of commercial applications, a reduction of process temperature is necessary. Using the previously described interfaces, the process temperature was reduced from 500∘C to 120∘C to determine its influence on the morphology at the interfacial layers by AFM and SEM studies, and on the electrical performance of the devices by IV-characteristic and IPCE measurements.