This work reports thermoelectric generators (TEGs) for portable and wearable self-powered electronic devices. Two kinds of TEGs, including low (device #1) and high (device #2) integrated number of thermoelectric elements, employing a high performance thermoelectric material fabricated by an assembly technology which are evaluated and compared against each other. Device #1 consists of 17 pairs of thermoelectric elements with dimensions of 1 mm × 1 mm × 2 mm while device #2 has 127 pairs of thermoelectric elements with dimensions of 0.4 mm × 0.4 mm × 2 mm. Both devices are fabricated on the same substrate of 15 mm × 15 mm. Maximum output powers for devices #1 and #2 are obtained as 10.1 mW and 33.9 mW at temperature difference ΔT of 75 °C, respectively, while at low ΔT = 5 °C, those of devices #1 and #2 are 43 µW and 91 µW, respectively. Fabricated TEGs show higher performance in comparison to the recent related works. Moreover, the harvested energy from the fabricated TEG can be stored in a rechargeable battery via a DC-DC converter. The output of the DC-DC converter reaches 2.8 V and 4 V at ΔT = 2 °C and 8 °C, respectively, which corresponds to the DC-DC electronic conversion efficiency ${\eta }_{\mathit{DC}-DC}$ is 8.1% and 23.3%, respectively. The fabricated TEG as a power source for a calculator as well as a twist watch has been demonstrated successfully. The investigation in this work indicated that the fabricated TEG possesses a high potential for portable and wearable self-powered electronic devices.

这项工作报告了用于便携式和可穿戴自供电电子设备的热电发电机 (TEG)。两种 TEG，包括低（设备 #1）和高（设备 #2）集成数量的热电元件，采用通过组装技术制造的高性能热电材料，并相互评估和比较。设备 #1 由 17 对热电元件​​组成，尺寸为 1 mm × 1 mm × 2 mm，而设备 #2 有 127 对热电元件​​，尺寸为 0.4 mm × 0.4 mm × 2 mm。两种器件均在 15 mm × 15 mm 的同一基板上制造。在温差 ΔT 为 75 °C 时，器件 #1 和 #2 的最大输出功率分别为 10.1 mW 和 33.9 mW，而在低 ΔT = 5 °C 时，器件 #1 和 #2 的最大输出功率分别为 43 µW 和分别为 91 µW。与最近的相关工作相比，制造的 TEG 表现出更高的性能。此外，从制造的 TEG 中收集的能量可以通过 DC-DC 转换器存储在可充电电池中。DC-DC转换器的输出在ΔT=2℃和8℃时分别达到2.8V和4V，对应DC-DC电子转换效率${\eta }_{\mathit{直流电}——DC}$分别为 8.1% 和 23.3%。制造的 TEG 作为计算器和扭扭表的电源已被成功演示。这项工作的调查表明，制造的 TEG 具有用于便携式和可穿戴自供电电子设备的巨大潜力。