Flexible Porous Bismuth Telluride Thin Films with Enhanced Figure of Merit using Micro‐Phase Separation of Block Copolymer

Flexible Porous Bismuth Telluride Thin Films with Enhanced Figure of Merit using Micro‐Phase Separation of Block Copolymer

Flexible porous bismuth telluride thin films are prepared using micro‐phase separated block‐copolymer porous films. The thermal conductivities of the thus‐fabricated porous p‐type (Bi0.4Te3.0Sb1.6) and n‐type (Bi2.0Te2.7Se0.3) thin films are extremely lower than those of their bulk counterparts owin...

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Veröffentlicht in:Advanced materials interfaces 2014-04, Vol.1 (2), p.np-n/a
Hauptverfasser: Kato, Kunihisa, Hatasako, Yoshika, Uchino, Michitaka, Nakata, Yasukazu, Suzuki, Yoshinori, Hayakawa, Teruaki, Adachi, Chihaya, Miyazaki, Koji
Format: Artikel
Sprache:eng
Schlagworte:
Bismuth tellurides
Block copolymers
Blocking
Figure of merit
flexible substrates
Heat transfer
microphase separation
Scattering
Thermal conductivity
thermoelectricity
Thin films
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Zusammenfassung:Flexible porous bismuth telluride thin films are prepared using micro‐phase separated block‐copolymer porous films. The thermal conductivities of the thus‐fabricated porous p‐type (Bi0.4Te3.0Sb1.6) and n‐type (Bi2.0Te2.7Se0.3) thin films are extremely lower than those of their bulk counterparts owing to strong phonon scattering. The figure of merit ZT of porous p‐, n‐ bismuth telluride thin films is estimated to be 1.34 and 1.47.
ISSN:2196-7350
2196-7350
DOI:10.1002/admi.201300015