Effects of annealing and doping on nanostructured bismuth telluride thick films
2008 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 20, no 13, 4403-4410 p.Article in journal (Refereed) Published
Bismuth telluride is the state-of-the-art thermoelectric (TE) material for cooling applications with a figure of merit of ∼1 at 300 K. There is a need for the development of TE materials based on the concept of thick films for miniaturized devices due to mechanical and manufacturing constraints for the thermoelement dimensions. We reported earlier a method for the fabrication of high-quality nanostructured bismuth telluride thick films with thickness from 100 to 350 μm based on electrochemical deposition techniques. In this paper, annealing is performed to further improve the TE performance of the nanostructured bismuth telluride thick films and n/p-type solid solutions are successfully fabricated by doping Se and Sb, respectively. The conditions for both annealing and doping for the thick films are investigated, and the effects of annealing and doping on morphology, crystalline phase, grain size, Seebeck coefficient, homogeneity, electrical conductivity, and power factor of the bismuth telluride thick films have been studied.
Place, publisher, year, edition, pages
2008. Vol. 20, no 13, 4403-4410 p.
Bismuth, Electric conductivity, Electric power factor, Films, Microelectronics, Molecular beam epitaxy, Optical design, Reduction, Seebeck coefficient, Solid solutions, Thick films, Vapor deposition
IdentifiersURN: urn:nbn:se:kth:diva-8684DOI: 10.1021/cm800696hISI: 000257279200034ScopusID: 2-s2.0-47749119959OAI: oai:DiVA.org:kth-8684DiVA: diva2:14070
QC 20100910. Uppdaterad från In press till Published (20100910)2008-06-042008-06-042010-11-25Bibliographically approved