Processing influence on structural and electronic properties of Lead Methylammonium Tri-Iodide films

Wolfgang Kowalsky^a, Christian Müller^a, Robert Lovrincic^a, Hans-Hermann Johannes^a, Bernd Epding^b

^aInstitute of High-Frequency Technology, TU Braunschweig, Schleinitzstr. 22, Braunschweig, 38106, Germany

^bKirchhoff-Institute for Physics, Ruprecht-Karls-University Heidelberg, Im Neuenheimer Feld, 227, Heidelberg, Germany

^cInnovationLab GmbH, Heidelberg-Germany, Speyerer Straße, 4, Heidelberg, Germany

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Christian Müller, 368
Publication date: 5th February 2015

Over the last few years the power conversion efficiency of organometal-halide perovskite (such as CH₃NH₃PbI₃) based solar cells has skyrocketed at an unprecedented rate to values around 18%. This development is even more impressive if we take into account that such high efficiencies can be reached for very different cell, made from different precursor materials, and for both solution and vacuum processed absorber layers. All this approaches have in common that the exact role of the perovskite microstructure for the device performance is to date not well understood. We focus in this work on a comparison between solution vs. vacuum processed perovskite layers and solar cells based thereon. SPM, SEM and EBIC measurements were performed at the very same spot under different conditions for the different perovskite films. Thereby we were able to map electronic and structural properties with high spatial resolution. This enables us to directly correlate the obtained data to the device performance.

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International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

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