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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Poster Session I
CPP 15.41: Poster
Monday, March 17, 2025, 19:00–21:00, P4
Impact of the electrode area on the local J-V curves of organic photovoltaics — •Paul Schwanitz1, Fabian Eller1, Carsten Deibel2, and Eva M. Herzig1 — 1Dynamik und Strukturbildung - Herzig Group, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany — 2Institut für Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany
Organic photovoltaics (OPV) are promising candidates for flexible solar cells, which may be more cost efficient to produce than their silicon counterparts. The organic semiconductor materials can be dissolved and printed on large scale, with the attractive advantage that the geometry of the OPV devices can be chosen on demand. The aim here is to analyze the influence of the top and bottom size of the electrodes on the J-V curve measurements. If the active areas are too small, fluctuations in the performance can occur, which are caused by inhomogeneities in the film. As the active area increases, performance is expected to stabilize as it is averaged over a larger area [1]. The different sizes of the anode and cathode also enable in-line measurements during production. The sizes of the electrodes are systematically varied to estimate the influence on the measurements, to interpret the J-V curves correctly and to account for the dark currents.
[1] Herzig, E. M., Gao, F., Bergqvist, J., Loi, M. A., & Meier, S. B. Harmonizing organic photovoltaics research and development among academia and industry. Joule, 8, 2171 (2024). https://doi.org/10.1016/j.joule.2024.07.015
Keywords: electrode size; organic photovoltaics; IV characteristics; dark current; upscaling