期刊
CHEMISTRYOPEN
卷 12, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/open.202300045
关键词
crystal structure; molecular precursor; semiconductors; thin films; spin coating
In this study, a suitable single-source precursor for the deposition of nanostructured PbS thin films at moderate temperatures under ambient conditions was sought. The ligand N-(thiomorpholine-4-carbothioyl)benzamide and its corresponding lead(II) complex were synthesized and their structures were determined. The lead complex showed promising thermal decomposition behavior, leading to the successful fabrication of phase-pure PbS thin films at a comparably low annealing temperature of 250 degrees C. The resulting films exhibited nanoparticles with cuboidal morphology and blue-shifted optical absorption.
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 center dot center dot center dot 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, H-1 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 degrees C. The film showed nanoparticles with cuboidal morphology and a blue-shifted optical absorption.
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