Patent ID: 8222510

Claim:
A thermoelectric system, comprising: (A) a substrate comprising a first complex oxide doped with La, Nb or Y, and (B) a second complex oxide; wherein the second complex oxide is (a) embedded within the first complex oxide or (b) a first layer indirectly over one surface of the first complex oxide wherein the first layer does not contact the first complex oxide; wherein: the second complex oxide is of the formula M 1 a-x M 2 b M 3 x O c-δ (I) or M 1 a M 2 b-x M 3 x O c-δ (II) or M 1 a M 2 b O c-δ (III); M 1 is one element selected from the group consisting of Na, K, Li, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Ca, Sr, Ba, Al, Y, and Bi; M 2 is one element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Mo, W, Nb, Ta, and Ag; M 3 is one element selected from the group consisting of La, Nb, and Y; M 1 , M 2 or M 3 are different elements from each other; and 1≦a≦4; 1≦b≦4; 2≦c≦10; 0≦x≦4; and 0<δ≦c for formula (I) and (II) and 0≦δ≦c for formula (III).