SKM 2023 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 36: Organic Electronics and Photovoltaics II (joint session CPP/HL)

CPP 36.8: Talk

Wednesday, March 29, 2023, 17:00–17:15, GÖR 226

Influence of dye-doping on the nanostructure of the highly efficient PM6:Y6 solar cells — •Elisabeth Erbes^1,2, Constantin Harder^1,3, Benedikt Sochor¹, Susann Frenzke¹, Naireeta Biswas^1,2, Jan Rubek¹, Matthias Schwartzkopf¹, Volker Körstgens³, Peter Müller-Buschbaum^3,5, Stephan V. Roth^1,4 und Simone Techert^1,2 — ¹DESY, Hamburg, DE — ²Institute for X-ray Physics, Goettingen University, Goettingen, DE — ³TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany — ⁴KTH Royal Institute of Technology, Stockholm, SWE. — ⁵MLZ, TUM, Garching, DE

Organic solar cells based on the donor polymer PM6 and the acceptor Y6 give power conversion efficiencies (PCE) of 13-16% without any additives. The current study aims to investigate systematically the effect of doping PM6:Y6 with optical-light absorbing, electron transfer (ET) dyes. These pyrene-based dyes (PyxDMA) have inter- and intra-molecular charge transfer properties and a very high quantum yield. Also the absorption in the UV regime extends the absorption range of the PM6:Y6 system. The structural and morphological integrity of the dopants within the active layer were studied with grazing incidence X-ray scattering experiments. The analysis showed the intercalation and distribution of the dyes within the PM6:Y6 matrix. The sprayed solar cell architecture Cu/PM6:Y6:PyxDMA/PEDOT:PSS/Au/ITO/Glass was used to measure the PCEs. Correlating these efficiencies with the molecular and nanostructural results allows explaining the changing PCE due to different doping levels of PyxDMA.