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Journal Article

Thiourea-Derived Single-Source Molecular Precursor For Spin-Coated PbS Thin Films

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Ruck,  Michael
Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Ketchemen, K. I. Y., Lapalikar, V., Carrillo-Aravena, E., Nyamen, L. D., Ndifon, P. T., & Ruck, M. (2023). Thiourea-Derived Single-Source Molecular Precursor For Spin-Coated PbS Thin Films. ChemistryOpen, 12(4): e202300045, pp. 1-7. doi:10.1002/open.202300045.


Cite as: https://hdl.handle.net/21.11116/0000-000D-081C-C
Abstract
In search of a suitable single-source precursor for the deposition of nanostructured PbS thin films at moderate temperatures under ambient conditions, we have synthesized the ligand N-(thiomorpholine-4-carbothioyl)benzamide and its corresponding lead(II) complex. The structures of both compounds were determined by single-crystal X-ray diffraction. In the complex, two ligands coordinate to a lead(II) atom in hemi-directed geometry through S and O atoms. Secondary intermolecular Pb⋅⋅⋅S interactions group the complexes into pairs. As bulk powders, both the ligand and complex show nominal composition and purity as evidenced by elemental analysis, 1 H NMR and IR spectroscopy. Thermal analysis of the lead(II) complex was carried out to understand its thermal decomposition behaviour for establishing a thin film fabrication protocol. Thin films of phase-pure PbS were fabricated using this new molecular precursor at the comparatively low annealing temperature of 250 °C. The film showed nanoparticles with cuboidal morphology and a blue-shifted optical absorption. © 2023 The Authors. Published by Wiley-VCH GmbH.