Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster 1
CPP 12.62: Poster
Montag, 5. September 2022, 18:00–20:00, P1
Improved hole extraction selectivity of polymer solar cells by combining PEDOT:PSS with WO3 — •Aurelien Sokeng Djoumessi1,2, Shahidul Alam1,2, Jose Prince Madalaimuthu1,2, Aman Anand1,2, Josef Slowik1,2, Theo Pflug3,4, Rico Meitzner1,2, Roland Roesch1,2, Enrico Gnecco5, Alexander Horn3, Ulrich S. Schubert1,2, and Harald Hoppe1,2 — 1Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany — 2Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldstrasse 10, 07743 Jena, Germany — 3Laserinstitut Hochschule Mittweida, Hochschule Mittweida, Schillerstraße 10, 09648 Mittweida, Germany — 4Institut für Physik, Technische Universität Chemnitz, Reichenhainer Straße 70, 09126 Chemnitz, Germany — 5Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
Since the device performance and stability of polymer solar cells strongly depend on the interfacial charge extraction layers, we investigated the impact of hole transport layer (HTL) in the devices by varying the HTL material and layer stack systematically between PEDOT:PSS and a sol-gel derived tungsten oxide (WO3). Interestingly there was an increase of the work function upon stacking both materials and the triple layer WO3/PEDOT:PSS/WO3 configuration resulted in the best device performance and an increased reproducibility in the lifetime compared to the use of pristine WO3 and PEDOT:PSS