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 36.7: Talk

Wednesday, March 29, 2023, 16:45–17:00, GÖR 226

Compatible solution-processed interface materials for improving the efficiency of organic solar cells — •Zhuo Xu^1,2, Jose Prince Madalaimuthu^1,2, Josef Bernd Slowik^1,2, Rico Meitzner^1,2, Aman Anand^1,2, Shahidul Alam^1,2,4, Héctor Corte⁵, Steffi Stumpf^1,3, Ulrich S. Schubert^1,2,3, and Harald Hoppe^1,2 — ¹Laboratory of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena, Jena, Germany. — ²Center for Energy and Environmental Chemistry Jena, Friedrich Schiller University Jena, Jena, Germany. — ³Jena Center for Soft Matter, Friedrich Schiller University Jena, Jena, Germany. — ⁴King Abdullah University of Science and Technology, KAUST Solar Center, Physical Sciences and Engineering Division, Material Science and Engineering Program, Thuwal, Kingdom of Saudi Arabia. — ⁵Nanosurf AG, Liestal, Switzerland.

The electron transport layer (ETL) is a key components for better performance and stability in OSCs. Herein, conjugated PDINO, sol-gel derivatized under stoichiometric TiOx, and the same combination as the ETL was used to fabricate solution-processed PBDTTT-C-T:PC71BM-based OSCs. A hybrid of organic-inorganic ETL revealed less bimolecular and trap-assisted recombination than a single ETL of either material. Furthermore, the efficiency of devices using blend ETLs showed better performance in comparison to single ETLs in both fullerene and non-fullerene systems. This blending strategy have demonstrated beneficial consequences in device stability and efficiency, which will play key role for future commercialization of OSCs.