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- Title
Impact of sulfur concentration on morphological, optical, electrical and thermoelectrical properties of nanostructured MoO thin films.
- Authors
Adelifard, M.; Jahandoost, M.
- Abstract
We have investigated the effect of sulfur concentration ([S]/[Mo] = 0-10 at.%) on nanostructural, optical and electrical properties of MoO thin films grown on glass substrate by spray pyrolysis technique. X-ray diffraction analysis showed that the films were crystallized with mixed structures of MoO orthorhombic and MoS hexagonal structure. According to FESEM images, the studied films have a sponge-type structure on the order of nanometers. Optical measurements revealed that two distinct inflexions indicative two transitions correspond to MoO/MoS phases in agreement with the XRD analysis. The Hall effect and thermoelectric measurements have shown p-type conductivity, and the free hole density increases with increasing sulfur to molybdenum ratio, in agreement with reflectance spectra of the layers. The obtained value of Seebeck coefficient for MoO film with [S]/[Mo] ratio of 8 at.% was as high as 169 μV/K.
- Subjects
MOLYBDENUM compounds; METALLIC thin films; THERMOELECTRICITY; OPTICAL properties of nanostructured materials; ELECTRIC properties of nanostructured materials; PYROLYSIS; HALL effect
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 5, p5427
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-4445-1