Dresden 2026 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster I

CPP 17.5: Poster

Monday, March 9, 2026, 19:00–21:00, P5

Optimization of Slot-Die Printed Organic Solar Cells — •Dinusha M. Egalla, Christoph G. Lindenmeir, and Peter Müller-Buschbaum — TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany

Organic solar cells (OSCs) are promising candidates for lightweight, flexible, and low-cost photovoltaic technologies due to their solution processability and compatibility with large-area printing. The performance and stability of printed OSCs, however, are highly influenced by the morphology and uniformity of the active layer, which are sensitive to changes in coating and processing conditions. In this work, we investigate the optimization of printed donor-acceptor active layers by systematically varying key fabrication parameters, including coating temperature, printing speed, and solution preparation. The resulting thin films are characterized using UV-Vis spectroscopy to evaluate optical absorption, and microscopy to investigate the film homogeneity, while X-ray reflectivity (XRR) is used to determine film thickness and roughness. Full devices are built and assessed through current-voltage (J-V) measurements under standard illumination to establish how different printing conditions affect active-layer morphology and overall photovoltaic performance.

Keywords: Organic Solar Cells; Photovoltaic; Printing