Method for measuring Seebeck coefficient of micro/nano thermoelectric materials or devices

The invention discloses a method for measuring the Seebeck coefficient of micro/nano thermoelectric materials or devices, which comprises the following steps of: connecting the two ends of a sample formed by connecting two thermoelectric materials with heat sinks, putting into a vacuum environment, introducing alternating current I0 sin(omega t) with frequency omega and amplitude I0, generating parabolic temperature distribution on the sample to be measured through a Joule heating effect, and adding one steady component and two harmonic components to obtain the temperature at a junction of the materials to be measured, wherein for the thermoelectric materials, the steady temperature component at the junction and a temperature difference formed at the heat sink ends can generate direct-current Seebeck thermal electromotive force due to a Seebeck effect; and acquiring a direct-current voltage signal and theoretically solving a steady temperature difference simultaneously, so that the Seebeck coefficient of the thermoelectric materials to be measured can be obtained. The method has the advantages of high measuring accuracy, simple experiment device, low test cost and the like, and iseasy to implement, and a new idea is provided for evaluating and representing a micro/nano scale thermoelectric conversion system.