|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications V
||L-19: Synthesis and Thermoelectric Properties of ZnSnSb2 with Chalcopyrite Structure
||Ami Nomura, Ken Kurosaki, Seongho Choi, Yuji Ohishi, Hiroaki Muta, Shinsuke Yamanaka
|On-Site Speaker (Planned)
Our group has discovered that CuGaTe<SUB>2</SUB> with chalcopyrite structure exhibits exceptionally high thermoelectric (TE) figure of merit <I>zT</I> = 1.4 [T. Plirdpring et al., <I>Adv. Mater.</I> 24, 3622 (2012).]. It has been also proved that when the tetragonal lattice parameter ratio (<I>c</I>/<I>a</I>) closet to 2, the valence bands of the chalcopyrite compounds highly degenerate at the band-edge, leading to enhancement of the power factor (<I>PF</I>). Actually, the <I>c</I>/<I>a</I> ratio of CuGaTe<SUB>2</SUB> is close to 2. Since the <I>c</I>/<I>a</I> ratio of ZnSnSb<SUB>2</SUB> with chalcopyrite structure is just 2, ZnSnSb<SUB>2</SUB> is expected to show high <I>PF</I>. However, reports on the TE properties of ZnSnSb<SUB>2</SUB> have been limited because it is hard to synthesize single-phase ZnSnSb<SUB>2</SUB>. In the present study, we succeeded to synthesize pure ZnSnSb<SUB>2</SUB> with no impurities by using a Sn flux method. The details of the sample synthesis method and conditions and the TE properties will be presented.
||Planned: Supplemental Proceedings volume