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SKM 2023 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 32: Organic Electronics and Photovoltaics II (joint session CPP/HL)

HL 32.7: 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 Xu1,2, Jose Prince Madalaimuthu1,2, Josef Bernd Slowik1,2, Rico Meitzner1,2, Aman Anand1,2, Shahidul Alam1,2,4, Héctor Corte5, Steffi Stumpf1,3, Ulrich S. Schubert1,2,3, and Harald Hoppe1,21Laboratory 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.

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