Publication date: 15th December 2025
The power conversion efficiency (PCE) of organic photovoltaics (OPV) has recently surpassed the 20% mark on record cell level (<0.1 cm²), but is still lagging behind for larger devices. Therefore, our research group primarily focuses on the upscaling of such emerging PV technologies from small cell level all the way to large-area modules.
In this talk, the systematic upscaling of OPV devices based on the photoactive system PM6:Y6-C12:PC61BM is presented. All devices are solution-processed in ambient air from non-halogenated solvents. Finite element method (FEM) simulations are used to optimize the layout of large-area cells (1 cm²) and modules >200 cm², to achieve outstanding PCEs of 15.9% and 14.5%, respectively. Furthermore, fully printed semi-transparent modules using silver nanowires as top electrode are developed and optimized regarding transparency and efficiency. Finally, an encapsulation method for such modules is developed and the encapsulated modules are extensively characterized and tested regarding lifetime under different accelerated ageing conditions.
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