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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Poster Session I
CPP 15.46: Poster
Montag, 17. März 2025, 19:00–21:00, P4
Multiscale morphological modulation in spray-coated organic solar cells — •Shuxian Xiong1,2, Benedikt Sochor1, Constantin Harder1,2, Sarathlal Koyiloth Vayalil1, Peter Müller-Buschbaum2, and Stephan V. Roth1,3 — 1Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany — 2TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 3KTH Royal Institute of Technology, 10044 Stockholm, Sweden
The balance between phase separation and crystallization arising from the aggregations of organic semiconductor molecules defines the film morphology, resulting in multi-length scale phase transitions that enhance device performance. We investigate the morphological evolution driven by molecular self-assembly during the ultrasonic spray-coating of organic functional layers in organic solar cells. An in-depth understanding of phase transition phenomena through an analysis of both temporal (film formation kinetics) and thermal scales (annealing), with the elucidation of the intricate structure-performance nexus linked to morphological evolution and device efficiency, is achieved. We clarify the principles of effective morphological optimization to achieve high-efficiency sprayed organic solar cells, providing valuable guidance for their commercial application.
Keywords: x-ray scattering; organic solar cell; morphology