Fig. 3
From: Thermoelectric Properties of Hot-Pressed Bi-Doped n-Type Polycrystalline SnSe
(Color online) Temperature dependence of the electrical conductivity (a, d), Seebeck coefficient (b, e), and power factor (c, f) of samples with various Bi contents along ⊥ and // directions as defined in the inset of a and d, where the black arrows indicated the press direction P. The n-type maximum power factor as a function of Bi content is shown in the inset of c and f