Thermoelectric figure of merit of tau-type conductors of several donors

H. Yoshino; H. Aizawa; K. Kuroki; G. C. Anyfantis; G. C. Papavassiliou; K. Murata

doi:10.1016/j.physb.2009.11.078

paper

Thermoelectric figure of merit of tau-type conductors of several donors

arXiv:1002.3395 · doi:10.1016/j.physb.2009.11.078

Abstract

Dimensionless thermoelectric figure of merit $Z T$ is investigated for two-dimensional organic conductors $τ - (E D O - S, S - D M E D T - T T F)_{2} (A u I_{2})_{1 + y}$ , $τ$ -(EDT-S,S-DMEDT-TTF)_2(AuI_2)_{1+y} $an d$ τ $- (P - S, S - D M E D T - T T F)_{2} (A u I_{2})_{1 + y}$ ( $y \leq 0.875$ ), respectively. The $Z T$ values were estimated by measuring electrical resistivity, thermopower and thermal conductivity simultaneously. The largest $Z T$ is 2.7 $\times$ 10 $^{- 2}$ at 155 K for $τ - (E D T - S, S - D M E D T - T T F)_{2} (A u I_{2})_{1 + y}$ , 1.5 $\times$ 10 $^{- 2}$ at 180 K for $τ - (E D O - S, S - D M E D T - T T F)_{2} (A u I_{2})_{1 + y}$ and 5.4 $\times$ 10 $^{- 3}$ at 78 K for $τ - (P - S, S - D M E D T - T T F)_{2} (A u I_{2})_{1 + y}$ , respectively. Substitution of the donor molecules fixing the counter anion revealed EDT-S,S-DMEDT-TTF is the best of the three donors to obtain larger $Z T$ .

proceedings of ISCOM 2009 (to be published in Physica B)

References in corpus (2)

Cited by in corpus (1)

Molecular Dependence of the Large Seebeck Effect in τ-type Organic Conductors