CPC H10N 10/17 (2023.02) [H10N 10/81 (2023.02); H10N 10/852 (2023.02)] | 14 Claims |
1. A thermoelectric conversion element, comprising:
a first electrode;
a second electrode;
a first intermediate layer;
a second intermediate layer;
a first external electrode connected to the first electrode via a first joint layer;
a second external electrode connected to the second electrode via a second joint layer; and
a thermoelectric conversion layer, wherein:
the first intermediate layer is provided between the thermoelectric conversion layer and the first electrode,
the first intermediate layer is in contact with the thermoelectric conversion layer,
the first electrode is in contact with the first intermediate layer,
the second intermediate layer is provided between the thermoelectric conversion layer and the second electrode,
the second intermediate layer is in contact with the thermoelectric conversion layer,
the second electrode is in contact with the second intermediate layer,
the first electrode and the second electrode contain at least Cu,
the thermoelectric conversion layer is composed of a thermoelectric conversion material containing Mg,
the thermoelectric conversion material contains at least one kind of element selected from the group consisting of Sb and Bi,
the thermoelectric conversion material contains at least one kind of element selected from the group consisting of Se and Te,
the thermoelectric conversion material has a La2O3-type crystalline structure,
the first intermediate layer and the second intermediate layer contain Cu, Mg, and at least one element selected from the group consisting of Sb and Bi,
the thermoelectric conversion layer, the first intermediate layer and the first electrode are continuous,
the thermoelectric conversion layer, the second intermediate layer and the second electrode are continuous,
the Mg is continuously present in the thermoelectric conversion layer and the first intermediate layer,
the Mg is continuously present in the thermoelectric conversion layer and the second intermediate layer,
a content of Cu in the first intermediate layer is not less than 50 weight percent,
a content of Cu in the second intermediate layer is not less than 50 weight percent,
a content of Mg in the first intermediate layer is smaller than the content of Cu in the first intermediate layer, and
a content of Mg in the second intermediate layer is smaller than the content of Cu in the second intermediate layer.
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