naa a22 4500 510802206 CHVBK 20180411083400.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11664-012-2405-y doi (NATIONALLICENCE)springer-10.1007/s11664-012-2405-y Nanostructuring and Thermoelectric Characterization of (GaSb)3(1− x )(Ga2Te3) x [Elektronische Daten] [Toshimichi Nakayama, Ken Kurosaki, Masaaki Shuto, Chang-eun Kim, Yuji Ohishi, Hiroaki Muta, Shinsuke Yamanaka] GaSb is a promising thermoelectric material that exhibits good electrical properties. However, it has a high lattice thermal conductivity (κ lat). Nanostructured bulk materials have been attracting interest because they effectively scatter phonons, significantly reducing κ lat. AgPb m SbTe m+2 (LAST-m) compounds have recently been reported to have low κ lat. These compounds have a NaCl structure, similar to that of binary PbTe, where Ag and Sb occupy the Pb site. In these compounds, two divalent Pb atoms are replaced with a monovalent Ag atom and a trivalent Sb atom to maintain charge compensation. In the present study, we reduced κ lat of GaSb by applying the same principle as in LAST-m. Specifically, we substituted Te for Sb and generated vacancies at the Ga site to maintain charge compensation. This produced compounds with chemical compositions of (GaSb)3(1−x)(Ga2Te3) x (x=0, 0.05, 0.10, and 0.25), where GaSb and Ga2Te3 both have the zincblende crystal structure. We employed two different annealing conditions: annealing at 833K followed by quenching, and annealing at 833K followed by cooling to room temperature over 3days. The former annealed samples with compositions of x=0.05 and 0.10 had nanoscale Ga-rich precipitates and exhibited a large reduction in κ lat. TMS, 2013 Thermoelectric nationallicence thermal conductivity nationallicence gallium antimonide nationallicence LAST nationallicence nanostructure nationallicence Nakayama Toshimichi Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut Kurosaki Ken Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut Shuto Masaaki Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut Kim Chang-eun Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut Ohishi Yuji Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut Muta Hiroaki Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut Yamanaka Shinsuke Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 1719-1724 0361-5235 42:7<1719 2013 42 11664 https://doi.org/10.1007/s11664-012-2405-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11664-012-2405-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nakayama Toshimichi Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut NATIONALLICENCE 700 1- Kurosaki Ken Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut NATIONALLICENCE 700 1- Shuto Masaaki Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut NATIONALLICENCE 700 1- Kim Chang-eun Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut NATIONALLICENCE 700 1- Ohishi Yuji Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut NATIONALLICENCE 700 1- Muta Hiroaki Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut NATIONALLICENCE 700 1- Yamanaka Shinsuke Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 1719-1724 0361-5235 42:7<1719 2013 42 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer