Abstract
The maximum temperature difference, which is corresponding to the optimal current, is important for evaluating the performance of thermoelectric coolers (TECs). As a representative of the thermoelectric leg with non-constant cross-section, the pyramidal thermoelectric leg has more advantages than the traditional cuboidal thermoelectric leg due to the large temperature gradient. However, the fabrication is much complex. In this work, a new shaped thermoelectric leg for TECs with almost the same property with the pyramidal legs is proposed and a simple practical approach for fabrication by taking one-side cut from the cuboidal leg is presented. Optimal current improvement is demonstrated by the theoretical calculation and the finite element simulation as well as the test results.
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