Being light, cheap, breathable and foldable, paper is emerging as a new type of substrate for flexible thermoelectric films. Several techniques including soaking and magnetron sputtering have been developed to coat inorganic semiconductors onto paper substrate, but the flexibility and thermoelectric performance of the resulting films are still far from satisfactory. This work implements a novel glass-fiber-aided cold-press method for achieving flexible n-type Ag₂Te nanowire (NW) films on copy-paper substrate. A greatly enhanced electrical conductivity has been realized in Ag₂Te NWs film due to the disappearance of grain boundaries under compression to 30 MPa. As a consequence, the largest power factor (PF) value of up to 192 μW (mK²)⁻¹ at 195 °C surpasses the performance of paper based thermoelectric films reported previously. Moreover, the PF value only decreases by 20% after 500 bending cycles, suggesting the good flexibility of the copy-paper supported Ag₂Te NWs films. A thermoelectric module containing 10 pieces of series-connected Ag₂Te films is fabricated using this glass-fiber-aided cold-press method. With ΔT increasing from 20 K to 80 K, the open-circuit voltage of module continually increases from about 11 mV to 60 mV. This measurement of open-circuit voltage has been repeated 10 times to confirm the stability of paper-supported Ag₂Te thermoelectric module. The glass-fiber-aided cold-press method in this study provides an effective access to high-performance, flexible and solvent-processable inorganic thermoelectric films on copy-paper substrate.

中文翻译：

---

在柔性复印纸基材上制备n型Ag ₂ Te纳米线热电薄膜的新型玻璃纤维冷压方法

纸张轻巧，便宜，透气和可折叠，是一种新兴的柔性热电薄膜基材。已经开发了包括浸泡和磁控溅射的几种技术来将无机半导体涂覆到纸基材上，但是所得膜的柔韧性和热电性能仍然远远不能令人满意。这项工作实现了一种新型的玻璃纤维辅助冷压方法，以在复印纸基材上获得柔性的n型Ag ₂ Te纳米线（NW）薄膜。由于在压缩至30 MPa时晶界消失，因此在Ag ₂ Te NWs膜中实现了大大提高的导电性。因此，最大功率因数（PF）值高达192μW（mK ²）^-1在195°C的温度下，其性能超过了先前报道的纸基热电薄膜的性能。而且，PF值在500次弯曲循环后仅降低了20％，表明复印纸支撑的Ag ₂ Te NWs膜具有良好的柔韧性。使用这种玻璃纤维辅助的冷压法制造了包含10个串联连接的Ag ₂ Te膜的热电模块。随着ΔT从20 K增加到80 K，模块的开路电压连续从大约11 mV增加到60 mV。该开路电压的测量已经重复了10次，以确认纸基Ag ₂的稳定性。Te热电模块。这项研究中的玻璃纤维辅助冷压方法为复印纸基材上的高性能，柔性和可溶剂加工的无机热电薄膜提供了有效途径。