Thermoelectric generators (TEGs) are a promising power source for realizing a self‐powered sensor, which is a primary component of the rapidly developing Internet of Things. Here, the fabrication of a prototype for a compact and flexible TEG (CF‐TEG) using ultra‐fine chip mounting technique is reported. The CF‐TEG consisting of 84 p‐n pairs was fabricated on a 10 × 10 mm² flexible substrate. A temperature difference (dT) of 150 K is successfully established for this TEG. Its maximum output voltage and power density are obtained as 2.4 V and 185 mW cm⁻², respectively, which corresponds to a conversion efficiency of 1.12% at dT = 150 K. Further, the experimental results are validated through theoretical analysis in which the contact effects are taken into account. This analysis is also used to elucidate the effect of thermal and electrical contact resistance on the output power. It is observed that ≈40% output power of this device is lost by these resistances, which proves that the contact properties significantly affect the performance of the TEG device.

中文翻译：

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基于高度精巧的芯片安装的超轻，紧凑，灵活的热电器件的制造与表征

热电发电机（TEG）是实现自供电传感器的有前途的电源，该传感器是快速发展的物联网的主要组成部分。在这里，报道了使用超细芯片安装技术制造紧凑而灵活的TEG（CF-TEG）的原型。由84对p-n组成的CF-TEG是在10×10 mm ^2的柔性基板上制造的。为此TEG成功建立了150 K的温差（d T）。其最大输出电压和功率密度分别为2.4 V和185 mW cm ^-2，对应于d时的转换效率为1.12％T = 150K。此外，通过理论分析验证了实验结果，其中考虑了接触效应。该分析还用于阐明热接触电阻和电接触电阻对输出功率的影响。可以观察到，这些电阻会损失该设备的约40％的输出功率，这证明了接触特性会严重影响TEG设备的性能。