THERMOELECTRIC MATERIALS, THERMOELECTRIC MODULE INCLUDING THERMOELECTRIC MATERIALS, AND THERMOELEC

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A thermoelectric material containing a dichalcogenide compound represented by Formula 1 and having low thermoelectric conductivity and high Seebeck coefficient : [in-line-formulae]RaTbX2−nYn  (1)[/in-line-formulae]wherein R is a rare earth element, T includes at least one element selected from the group consisting of Group 1 elements, Group 2 elements, and a transition metal, X includes at least one element selected from the group consisting of S, Se, and Te, Y is different from X and includes at least one element selected from the group consisting of S, Se, Te, P, As, Sb, Bi, C, Si, Ge, Sn, B, Al, Ga and In, a is greater than 0 and less than or equal to 1, b is greater than or equal to 0 and less than 1, and n is greater than or equal to 0 and less than 2.