Thermoelectric figure of merit of -(EDO-S,S-DMEDT-TTF)2(AuBr2)1+y, () and (TMTSF)2PF6

Electrical resistivity, thermopower and thermal conductivity were measured simultaneously for τ -(EDO-S,S-DMEDT-TTF)2(AuBr2)1+y, ( y ≤ 0.875 ) and (TMTSF)2PF6, respectively. The thermoelectric figure of merit Z of the materials is determined by combining these transport coefficients. It was found that the dimensionless figure of merit Z T of τ -(EDO-S,S-DMEDT-TTF)2(AuBr2)1+y, ( y ≤ 0.875 ) amounts to 0.042 at 130 K. This relatively large Z T is due to large thermopower and small thermal conductivity measured by an improved method as compared with that previously reported by the present authors.