Abstract
A radioisotope thermoelectric generator based on (Bi, Sb)2(Te, Se)3 thermoelectric material was designed as a miniature long-life power supply for low-power devices. In the finite element method simulation, the maximum hot-side temperature is approximately 400K, and the voltage could reach 0.3V for one single-layer module at 0.5W heat source. Thermocouples films were prepared by screen printing. And one single-layer module, which was composed of five thermocouples, produces a power of 12 nW at 7.0mV in the test. It is predicted that 100-layer modules would generate 2.31mW at 2.34V, and the maximum power density and maximum conversion efficiency are 0.51 mWcm−3 and 0.46%, respectively.
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