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3D Conformal Printing and Photonic Sintering of High-Performance Flexible Thermoelectric Films Using 2D Nanoplates

机译:使用二维纳米板的高性能柔性热电薄膜的3D保形印刷和光子烧结

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摘要

Flexible thermoelectric (TE) devices hold great promise for energy harvesting and cooling applications, with increasing significance to serve as perpetual power sources for flexible electronics and wearable devices. Despite unique and superior TE properties widely reported in nanocrystals, transforming these nanocrystals into flexible and functional forms remains a major challenge. Herein, demonstrated is a transformative 3D conformal aerosol jet printing and rapid photonic sintering process to print and sinter solution-processed Bi2Te2.7Se0.3 nanoplate inks onto virtually any flexible substrates. Within seconds of photonic sintering, the electrical conductivity of the printed film is dramatically improved from nonconductive to 2.7 x 10(4) S m(-1). The films demonstrate a room temperature power factor of 730 mu W m(-1) K-2, which is among the highest values reported in flexible TE films. Additionally, the film shows negligible performance changes after 500 bending cycles. The highly scalable and low-cost fabrication process paves the way for large-scale manufacturing of flexible devices using a variety of high-performing nanoparticle inks.
机译:柔性热电(TE)器件在能量收集和冷却应用中具有广阔的前景,作为柔性电子设备和可穿戴设备的永久电源,其重要性日益提高。尽管在纳米晶体中广泛报道了独特和优异的TE性能,但将这些纳米晶体转变为柔性和功能形式仍然是一项重大挑战。本文展示了一种可转换的3D保形气溶胶喷射印刷和快速光子烧结工艺,可将溶液处理的Bi2Te2.7Se0.3纳米板油墨印刷并烧结到几乎任何柔性基板上。在光子烧结的几秒钟内,印刷薄膜的电导率从非导电性显着提高到2.7 x 10(4)S m(-1)。该膜表现出730μW m(-1)K-2的室温功率因数,这是柔性TE膜中报道的最高值之​​一。另外,该膜在500次弯曲循环后表现出微不足道的性能变化。高度可扩展且低成本的制造工艺为使用各种高性能纳米粒子墨水大规模制造柔性设备铺平了道路。

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