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O: Fachverband Oberflächenphysik
O 50: Poster Organic Molecules on Inorganic Substrates: Adsorption and Growth
O 50.8: Poster
Dienstag, 18. März 2025, 18:00–20:00, P2
Molecular self-assembly of BDA on CsPbBr3(100) — •Hannah Loh, Andreas Raabgrund, and M. Alexander Schneider — Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
CsPbBr3 is a promising alternative to organic-inorganic perovskites in solar cells and light emitting diodes [1]. In these devices, organic layers are often used as charge transport layers and hence interface properties are of particular interest. By choosing perticular anchoring groups of organic molecules (here the carboxylic COOH-group) the interaction with the perovskite material may be tuned.
In this contribution we investigate the self assembly of 4-4-biphenyl dicarboxylic acid (BDA) on epitaxial CsPbBr3 on Au(100) [2] by STM. For submonolayer coverage of BDA on CsPbBr3 we find that upon deposition at 305 K molecules grow epitaxially in compact islands. The islands consist of chains with a V-structure inside the chains similar to the way BDA self-assembles on Cu(111) [3].
[1] Bao C. et al., Organic Electronics, 73, 299-303 (2019)
[2] Rieger J. et al., Phys. Rev. Mat, 7, 035403 (2023)
[3] Schmitt T. et al., J. Phys. Chem. C, 120(2), 1043-1048, (2016)
Keywords: CsPbBr3; BDA