Effect of doping on thermoelectric properties of delafossite-type oxide CuCrO2

We have studied the effects of doping on the high-temperature thermoelectric properties of the delafossite-type oxide CuCrO2. The single or double doping of divalent cations for Cr3+ ions was carried out to introduce hole carriers. For the first step, we measured the electrical conductivity sigma and Seebeck coefficient S of single-doped samples, and calculated the power factor P = sigma S-2, Mg-, Zn-, Ca-, Ni-, and Co-doped samples showed a higher power factor than CuCrO2, while the Fe-, V-, and Mn- doped samples exhibited a lower power factor. The maximum power factor P = 2.36 x 10-4 W/mK(2)