Srither S R, Dhineshbabu N R, Shankar Rao D S, Krishna Prasad S, Dahlsten Oscar, Bose Suryasarathi
Centre for Nano and Soft Matter Sciences, Bengaluru 560013, India.
Department of Materials Engineering, Indian Institute of Science, Bengaluru 560012, India.
J Nanosci Nanotechnol. 2021 May 1;21(5):3072-3080. doi: 10.1166/jnn.2021.19143.
This study aims at investigating flexible and transparent thermoplastic polyurethane (TPU) as a novel material for triboelectric nanogenerator (TENG) devices with a polyethylene terephthalate layer. Devices having TPU-either as a flat film or as electrospun micrometer-dimension fibers with varying concentrations of TPU-were tested. The best output performing device provided 21.4 V and 23 A as open-circuit voltage and short-circuit current respectively, with the application of a small force of 0.33 N indicating the high efficiency of the device. Devices with flat films-obtained using the doctor-blade (DB) technique-have high transparency (80%) as well as high TENG output. The topography of the TPU layer, characterized by atomic force microscopy, reveals nanoscale roughness of the film surface. Finally, we demonstrate that gentle hand tapping on the TENG device can power upto 11 light-emitting diodes (LEDs). The high transparency, lightweight, simple fabrication, flexibility, and robust features of such device make it an added value for various optoelectronic applications.
本研究旨在研究柔性透明热塑性聚氨酯（TPU）作为一种用于带有聚对苯二甲酸乙二酯层的摩擦电纳米发电机（TENG）器件的新型材料。测试了以TPU为扁平薄膜或不同浓度TPU的电纺微米级纤维的器件。性能最佳的器件在施加0.33 N的小力时，分别提供21.4 V的开路电压和23 A的短路电流，表明该器件效率很高。使用刮刀法（DB）获得的带有扁平薄膜的器件具有高透明度（80%）以及高TENG输出。通过原子力显微镜表征的TPU层的形貌揭示了薄膜表面的纳米级粗糙度。最后，我们证明轻敲TENG器件可为多达11个发光二极管（LED）供电。这种器件的高透明度、轻质、简单制造、柔韧性和坚固特性使其在各种光电应用中具有附加价值。
