Dresden 2026 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 53: Hybrid, Organic and Perovskite Optoelectronics and Photovoltaics VII

CPP 53.2: Talk

Friday, March 13, 2026, 10:00–10:15, ZEU/LICH

Temperature Degradation of Slot-Die Printed Organic Solar Cells — •Christoph G. Lindenmeir¹, Simon A. Wegener¹, Christopher R. Everett¹, Julian E. Heger¹, Sigrid Bernstroff², and Peter Müller-Buschbaum¹ — ¹TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany — ²Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, Italy

Organic solar cells (OSCs) have emerged as promising candidates for next-generation photovoltaics due to their rapid efficiency improvements, low toxicity, and compatibility with low-cost, solution-based fabrication methods such as slot-die printing. Their high optical absorption, combined with their lightweight and flexible design, makes them particularly attractive for space applications. Offering a superior power-to-weight ratio compared to conventionally used III-V multijunction cells, OSCs can significantly reduce manufacturing and launch costs. While short-term demonstrations have confirmed their functionality in space, their long-term stability under extreme temperatures, high vacuum, and ionizing radiation still needs to be investigated. Therefore, this study compares the influence of constant-temperature conditions on active-layer morphology and electrical performance with that of temperature cycling. To investigate the degradation process, we employed operando grazing-incidence small-angle X-ray scattering (GISAXS), a nondestructive technique for probing thin-film morphology. Simultaneously, we monitored the electrical performance of the devices under vacuum to simulate space conditions.

Keywords: Organic Solar Cells; Printing; Space; Temperature; GISAXS