Fe-Doping Effect on Thermoelectric Properties of p-Type Bi(0.48)Sb(1.52)Te(3)

The substitutional doping approach has been shown to be an effective strategy to improve ZT of Bi(2)Te(3)-based thermoelectric raw materials. We herein report the Fe-doping effects on electronic and thermal transport properties of polycrystalline bulks of p-type Bi(0.48)Sb(1.52)Te(3). After a small...

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Detalles Bibliográficos
Autores principales: Mun, Hyeona, Lee, Kyu Hyoung, Kim, Suk Jun, Kim, Jong-Young, Lee, Jeong Hoon, Lim, Jae-Hong, Park, Hee Jung, Roh, Jong Wook, Kim, Sung Wng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455449/
https://www.ncbi.nlm.nih.gov/pubmed/28787981
http://dx.doi.org/10.3390/ma8030959
Descripción
Sumario:The substitutional doping approach has been shown to be an effective strategy to improve ZT of Bi(2)Te(3)-based thermoelectric raw materials. We herein report the Fe-doping effects on electronic and thermal transport properties of polycrystalline bulks of p-type Bi(0.48)Sb(1.52)Te(3). After a small amount of Fe-doping on Bi/Sb-sites, the power factor could be enhanced due to the optimization of carrier concentration. Additionally, lattice thermal conductivity was reduced by the intensified point-defect phonon scattering originating from the mass difference between the host atoms (Bi/Sb) and dopants (Fe). An enhanced ZT of 1.09 at 300 K was obtained in 1.0 at% Fe-doped Bi(0.48)Sb(1.52)Te(3) by these synergetic effects.

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