摘要
一種熱電模組，包含一個電極單元，及一個熱電單元，該電極單元包括二層彼此配合地用於電連接電源的電路圖案，該熱電單元包括多數個與該電極單元的電路圖案電連接的熱電元件，每一熱電元件具有一個成長方體柱狀的第一晶粒，及一個成梯形柱狀並包括一個面向該第一晶粒的傾斜側面的第二晶粒，該第一晶粒由n型半導體材料構成，該第二晶粒由自該傾斜側面摻雜且摻雜濃度自傾斜側面沿其法線方向遞減的p型半導體材料構成，藉該第二晶粒產生垂直和水平於熱流方向的西貝克效應，提昇熱電模組的開路電壓，及相關熱電特性。
A thermoelectric module includes an electrode unit and a thermoelectric unit. The electrode unit includes two layers of circuit patterns configured to be collaboratively in electrical connection with a power source. The thermoelectric unit includes a plurality of thermoelectric elements electrically connected to the circuit patterns of the electrode unit. Each thermoelectric element includes a first grain in a cuboid shape, and a second grain in a trapezoidal column shape and having an inclined side surface facing the first grain. The first grain is formed by an N-type semiconductor material. The second grain is formed by a P-type semiconductor material doped from the inclined side surface with a doping concentration declining from the inclined side surface along its normal direction. The present invention can use the second grain to produce a Seebeck effect that is perpendicular and horizontal to a heat flow direction, thereby improving the open circuit voltage of the thermoelectric module and related thermoelectric characteristics.