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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 32.9: Talk

Wednesday, March 29, 2023, 17:15–17:30, GÖR 226

Hydrogenated nanodiamonds as efficient electron extraction layers in organic solar cellsAurelien Sokeng Djoumessi1,2, Anastasia Sichwardt1,2, Daria Miliaieva3, Jan Čermák3, Maximilian Schaal4, Felix Otto4, Štěpán Stehlík3, Vojtech Nádaždy6, Torsten Fritz4, Bohuslav Rezek5, Ulrich S. Schubert1,2, and •Harald Hoppe1,21Laboratory of Organic and Macromolecular Chemistry, Friedrich Schiller University Jena (IOMC), Jena, Germany — 2Center for Energy and Environmental Chemistry (CEEC), Friedrich Schiller University Jena, Jena, Germany — 3Institute of Physics, Czech Academy of Sciences, Prague 6, Czech Republic — 4Institute of Solid State Physics, Friedrich Schiller University Jena, Jena, Germany — 5Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic — 6Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovak Republic

Surface tunability is one property of nanodiamonds (NDs), which enables to attachment of a range of functional groups on their surfaces. This may have a significant impact on NDs' electrical and optical characteristics and be helpful for charge extraction in solar cell devices. Herein, the surface chemistries of HPHT NDs modified by hydrogenation in a hydrogen atmosphere exhibit sp2-phases, which may help in improving the material's electrical conductivity and electron extraction when employed as an electron transport layer in PBDB-T:ITIC-based solar cells. The device performance was 7%, which differs only marginally from the outcomes of the state-of-the-art ETLs (ZnO, SnO2).

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