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Effects of the Defects on the Thermoelectric Properties of Cu–In–Te Chalcopyrite-Related Compounds

2012; Institute of Physics; Volume: 51; Issue: 12R Linguagem: Inglês

10.1143/jjap.51.121803

1347-4065

Atsuko Kosuga, Ryosuke Higashine, Theerayuth Plirdpring, Mie Matsuzawa, Ken Kurosaki, Shinşuke Yamanaka,

Quantum Dots Synthesis And Properties

We prepared and investigated the thermoelectric properties of Cu 0.4 InTe 2 at 310–710 K. The crystal structure of Cu 0.4 InTe 2 was identical to that of CuIn 3 Te 5 , namely a tetragonal structure, space group P 4̄2 c , known as an ordered defect chalcopyrite. This structure is different from that of CuInTe 2 , which has a normal chalcopyrite structure. In comparison with CuInTe 2 , Cu 0.4 InTe 2 showed inferior thermoelectric properties because a degradation in its electrical conductivity outweighed a reduction in its thermal conductivity. The maximum dimensionless figure of merit of Cu 0.4 InTe 2 was 0.17 at 702 K.