Thermoelectric power module

A thermoelectric power module comprising:

• a thermoelectric element employing a bismuth-tellurium (Bi—Te) based thermoelectric material;
• at least one barrier layer deposited on the thermoelectric element;
• an electrode;
• an electrode protection layer deposited at least on one principal surface of the electrode;
• a solder layer having a side surface formed with a recess, wherein the solder layer joins a first region of the electrode protection layer to the at least one barrier layer;
• and
• a coating film continuously deposited on a side surface of the thermoelectric element, a side surface of the at least one barrier layer, and the side surface of the solder layer, wherein the coating film covers a second region adjacent to the first region of the electrode protection layer and is filled into the recess of the solder layer, and a film thickness of the coating film at the side surface of the thermoelectric element is thinner than a thickness of the solder layer,
• wherein the film thickness of the coating film at the side surface of the thermoelectric element is within a first range from 3 μm to 20 μm, a film thickness of the coating film at the side surface of the at least one barrier layer is within a second range and larger than the film thickness within the first range, and a film thickness of the coating film at the side surface of the solder layer is within a third range and larger than the film thickness within the second range, when measured from a plane passing along the side surface of the thermoelectric element and in a direction orthogonal to the plane.