Thermoelectric conversion element and method for manufacturing thermoelectric conversion element

A method for manufacturing a thermoelectric conversion element comprising:

• a step of treating a solution including at least a carbon nanotube and a dispersion medium using a high-speed spin thin film dispersion method and preparing a CNT coating fluid obtained by dispersing the carbon nanotube in the dispersion medium;
• a step of applying and drying the CNT coating fluid on a first substrate having a highly thermal conductive portion having a higher thermal conductivity than other regions in at least a part thereof in a surface direction, thereby forming a thermoelectric conversion layer;
• a step of connecting an electrode pair to the thermoelectric conversion layer so as to sandwich the thermoelectric conversion layer in the surface direction;
• and
• a step of laminating a second substrate which has a highly thermal conductive portion having a higher thermal conductivity than other regions in at least a part thereof in the surface direction and in which the highly thermal conductive portion does not fully overlap the highly thermal conductive portion of the first substrate in the surface direction on the thermoelectric conversion layer.