Crystallization and Thermoelectric Power of Tl 2 Te 3 Single Crystals

Thermoelectric power (TEP) of Tl 2 Te 3 was measured in the temperature range from 150 to 480 K. The crystal was found to have a p‐type conductivity throughout the whole range of temperature. The effective masses of holes and electrons were determined at room temperature and found to be m   p *= 1.1 × 10 −34 kg and m   n *= 1.72 × 10 −35 kg, respectively. Also at the same temperature the mobility μ p was found to be 1737.8 cm 2 /V.s and μ n was 3962.2 cm 2 /V.s. The hole and electron diffusion coefficients were obtained as 44.84 cm 2 /s, and 102.23 cm 2 /s. The relaxation times for holes and electrons were calculated and yielded the values τ p = 1.19 × 10 12 s and τ n = 4.25 × 10 13 s, respectively.