Abstract
Oxide coatings are corrosion resistant at elevated temperatures. They also show intensive phonon scattering and strong quantum confinement behavior. Such features allow them to be used as new materials for thermoelectric energy conversion and temperature measurement in harsh environments. This paper provides an overview on processing thermoelectric oxide coatings via various technologies. The first part deals with the thermoelectricity of materials. A comparison on the thermoelectric behavior between oxides and other materials will be made to show the advantages of oxide materials. In the second part of the paper, various processing technologies for thermoelectric metal oxide coatings in forms of thin film, superlattice, and nanograin powder will be presented. Vapor deposition, liquid phase deposition, nanocasting, solid state approach, and energy beam techniques will be described. The structure and thermoelectric property of the processed metal oxide coatings will be discussed. In addition, the device concept and applications of oxide coatings for thermoelectric energy conversion and temperature sensing will be mentioned. Perspectives for future research will be provided as well.
Highlights
Thermoelectric materials can generate electricity when a temperature difference exists.Such a function allows a thermoelectric module to be used as an energy converter [1] or thermal sensor [2]
Thermoelectric metallic oxide coatings are promising for high temperature thermoelectric energy conversion applications due to their high corrosion resistance
Several metallic oxide coatings with tuned structures are suitable for building energy converters and sensors due to their enhanced thermoelectric performances
Summary
Thermoelectric materials can generate electricity when a temperature difference exists. As reported by Shiraishi et al [37], the photo-Seebeck effect in Coatings 2021, 11, 284 the perovskite titanium oxide, SrTiO3, leads to the high mobility of the photon-induced electrons by the 405 nm laser excitation, which is considered as an additional contribution to the increased electrical conductivity. In some other oxide based thermoelectric materials with different compositions and structures [38,39,40,41,42,43], how the photon-induced carriers contribute to the thermoelectric behavior, i.e., the photo-Seebeck effect was examined as well. The light illumination increases both the carrier concentration and the mobility, as found in doped ZnO with impurities Another important wide-band gap oxide, WO3, demonstrates the photo-Seebeck effect [41,42]. Perspectives to future research directions will be discussed and concluding remarks will be drawn
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
