Portal de Periódicos da CAPES

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

10.7567/jjap.51.121803

1347-4065

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

Semiconductor materials and interfaces

We prepared and investigated the thermoelectric properties of Cu0.4InTe2 at 310–710 K. The crystal structure of Cu0.4InTe2 was identical to that of CuIn3Te5, namely a tetragonal structure, space group P2c, known as an ordered defect chalcopyrite. This structure is different from that of CuInTe2, which has a normal chalcopyrite structure. In comparison with CuInTe2, Cu0.4InTe2 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 Cu0.4InTe2 was 0.17 at 702 K.