几种施主的τ型导体的热电优值
Thermoelectric figure of merit of tau-type conductors of several donors
摘要：
本文研究了二维有机导体$τ-(EDO-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$、$τ$ -（EDT-S，S-DMEDT-TTF）_2（AuI_2）_{1+y} $ and $ τ $-(P-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$（$y \le 0.875$）的无源热电优值$ZT$。通过同时测量电阻率、热电势和热导率来估计$ZT$值。最大的$ZT$为2.7 $\times$ 10 $^{-2}$在155 K的$τ-(EDT-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$，1.5 $\times$ 10 $^{-2}$在180 K的$τ-(EDO-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$和5.4 $\times$ 10 $^{-3}$在78 K的$τ-(P-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$。对固定抗衡阴离子的供体分子进行取代，发现EDT-S，S-DMEDT-TTF是三种供体中获得较大$ZT$的最佳供体。
英文摘要：
Dimensionless thermoelectric figure of merit $ZT$ is investigated for two-dimensional organic conductors $τ-(EDO-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$, $τ$-(EDT-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$ and $τ$-(P-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$ ($y \le 0.875$), respectively. The $ZT$ values were estimated by measuring electrical resistivity, thermopower and thermal conductivity simultaneously. The largest $ZT$ is 2.7 $\times$ 10$^{-2}$ at 155 K for $τ-(EDT-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$, 1.5 $\times$ 10$^{-2}$ at 180 K for $τ-(EDO-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$ and 5.4 $\times$ 10$^{-3}$ at 78 K for $τ-(P-S,S-DMEDT-TTF)_2(AuI_2)_{1+y}$, 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 $ZT$.
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