Dresden 2026 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster I

CPP 17.19: Poster

Montag, 9. März 2026, 19:00–21:00, P5

Spray Engineering for High-Efficiency Organic Solar Cells — •Xinyu Jiang¹, Kang An², Nadja Koelpin¹, Ning Li², and Stephan V. Roth^1,3 — ¹Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg — ²Institute of PolymerOptoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology (SCUT), Guangzhou, Guangdong 510641, China — ³Department of Fibre and Polymer Technology, KTH Royal Institute of Technology,Teknikringen 56-58, SE-100 44 Stockholm, Sweden

Spray coating has emerged as a powerful and scalable technique for fabricating high-performance organic solar cells (OSCs), offering precise control over ink deposition and rapid compatibility with large-area manufacturing. Compared with conventional solution-processing methods, spray deposition enables fine tuning of droplet dynamics, solvent evaporation, and wet-film thickness, which are critical for achieving optimal phase separation and molecular ordering in the active layer. In this work, we demonstrate that rational engineering of spray parameters such as atomization rate, nozzle substrate distance, carrier-gas flow, and solvent volatility significantly improves film uniformity and reduces morphological defects, leading to enhanced charge transport and suppressed recombination losses. By integrating these optimized spray processes, the resulting OSCs exhibit markedly improved device efficiency and excellent reproducibility across enlarged areas. These results highlight spray coating as a highly efficient and industry-ready pathway for the scalable integration of organic solar cells.

Keywords: organic solar cells; spray technique