Berlin 2018 – scientific programme

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DS: Fachverband Dünne Schichten

DS 17: Poster Session I

DS 17.80: Poster

Tuesday, March 13, 2018, 18:15–20:15, Poster B

Zone-Casting as a fully scalable deposition technique for high quality perovskite films — •Daniel Heimfarth, Simon Ternes, and Yana Vaynzof — Center for Advanced Materials, Heidelberg

With the performance of hybrid organometal-halide perovskite solar cells improving rapidly over the last several years, the future integration of this technology into industrial applications becomes a relevant topic. Specifically, common fabrication processes used in a laboratory setting, such as spin-coating, need to be replaced by scalable techniques, while maintaining excellent photovoltaic performance.
We investigate the suitability of zone-casting(also known as bar-casting), a meniscus-assisted deposition method for the fabrication of high quality perovskite films for photovoltaic applications. The method offers a large parameter space for investigation, including among others the substrate and solution temperatures as well as the deposition speed. We demonstrate that by tuning these parameters we are able to obtain a variety of perovskite films with different microstructures. A combination of high deposition speed and moderate substrate temperature results in uniform layers with large crystalline domains ( 200 µm) advantageous for perovskite photovoltaics. We demonstrate that the technique can be utilized for the large area fabrication of functional photovoltaic devices, with initial studies showing promising results with regards to the device power conversion efficiencies.