Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 46: Optical Properties

HL 46.6: Preisträgervortrag

Donnerstag, 20. März 2025, 11:15–11:45, H15

Development and Application of Computational Simulations to Optimize Organic Photovoltaic Modules — •Annika Janssen — Technische Hochschule Nürnberg — Laureate of the Georg-Simon-Ohm-Prize 2025

Organic photovoltaics (OPV) is one of the emerging solar technologies and has the possibility of more cost-effective and sustainable production compared to conventional silicon cells. The printing technique considered in this thesis is doctor blade printing. In research, this is mainly used to produce OPV, as it is fast and the coating physics is similar to slot-die coating, the technique that is most commonly used for large-scale R2R printing. To produce large modules, a homogeneous coating is important, since the thickness of the layers has an influence on the efficiency of the device. In this work, the influence of the film thickness on the efficiency is investigated experimentally on cell level and the influence of layer thickness variations is studied by means of electrical finite element method (FEM) simulations for large-area modules. Formulas describing the behavior of the injected ink during printing are established. A special focus was put on the analysis of the non-accelerated and the accelerated printing. Using simulations, this work shows that a homogeneous coating achieved by accelerating the doctor blade can improve the efficiency of organic solar modules by 16.22 %.

Keywords: photovoltaic; simulation; comsol