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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 Lemmer1,21Light 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 500C to 120C 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.

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