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 36.9: Talk

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

Hydrogenated nanodiamonds as efficient electron extraction layers in organic solar cells — Aurelien Sokeng Djoumessi^1,2, Anastasia Sichwardt^1,2, Daria Miliaieva³, Jan Čermák³, Maximilian Schaal⁴, Felix Otto⁴, Štěpán Stehlík³, Vojtech Nádaždy⁶, Torsten Fritz⁴, Bohuslav Rezek⁵, Ulrich S. Schubert^1,2, and •Harald Hoppe^1,2 — ¹Laboratory 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).