Highly oriented photoactive polycrystalline MoS2 layers obtained by van der Waals rheotaxy technique from electrochemically deposited thin films

摘要

Molybdenum sulphide thin films were cathodically electrodeposited from aqueous solutions of sodium tetrathiomolybdate on quartz substrate covered by a thin Ni-Cr layer. Annealing of these films in sulphur containing atmosphere at high-temperature resulted in the formation of highly-textured films of MoS2 with the van der Waals planes parallel to the substrate and crystal size in the micrometer range. The annealed films are photoactive and their photoconductivity measurements reveal a direct band gap of about 1.71 eV. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 16]