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Flexible Porous Bismuth Telluride Thin Films with Enhanced Figure of Merit using Micro‐Phase Separation of Block Copolymer
Author(s) -
Kato Kunihisa,
Hatasako Yoshika,
Uchino Michitaka,
Nakata Yasukazu,
Suzuki Yoshinori,
Hayakawa Teruaki,
Adachi Chihaya,
Miyazaki Koji
Publication year - 2014
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201300015
Subject(s) - materials science , bismuth telluride , figure of merit , thin film , bismuth , porosity , telluride , copolymer , porous medium , phase (matter) , optoelectronics , nanotechnology , composite material , thermoelectric materials , polymer , thermal conductivity , organic chemistry , metallurgy , chemistry
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 (Bi 0.4 Te 3.0 Sb 1.6 ) and n‐type (Bi 2.0 Te 2.7 Se 0.3 ) 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.