Abstract
We report improved thermoelectric performance of Cu2O-Cr/Sn composite powder by using a simple fabrication approach. Thermoelectric properties of pure Cu2O and Cu2O-Cr/Sn powder pellets are characterized in the temperature range of 300–400 K, where large amount of low-grade waste heat exists. We simply fabricate specimen through pressing powders intentionally without sintering. Seebeck coefficient about 1400 μV/K of pure Cu2O powder pellets was obtained, much higher than earlier reported value (700 μV/K). In addition, mixing Cu2O with Cr or Sn powder effectively increased the electrical conductivity, therefore the maximum power factor reached 0.1 μW·m−1 K−2 for Cu2O-Cr (mole ratio at 10:1) in contrast to pure Cu2O of ~0.05 μW·m−1 K−2. Improved thermoelectric performance by adding of Cr or Sn metal powder is thought to be due to remote doping, energy band bending, energy filtering effect and high electronic DOS (Density of States) at the interface. Our results show the potential application of Cu2O-Cr composite powder for thermoelectric devices. This simple fabrication process could possibly be applied to other thermoelectric systems.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
