A thermoelectric material is disclosed. The thermoelectric material is represented by the following formula; (A1-aA′a)4-x(B1-bB′b)3-y. A is a Group XIII element and A′ may be a Group XIII element, a Group XIV element, a rare earth element, a transition metal, or combinations thereof. A and A′ are different from each other. B may be S, Se, Te and B′ may be a Groups XIV, XV, XVI or combinations thereof. B and B′ are different from each other. a is equal to or larger than 0 and less than 1. b is equal to or larger than 0 and less than 1. x is between −1 and 1 and wherein y is between −1 and 1.