Tran Phuong, Tran Nguyen-Hung, Lee Ji-Hoon
Division of Electronics Engineering, Future Semiconductor Convergence Technology Research Center, Jeonbuk National University, Jeonju, 54896, Korea.
Sci Rep. 2022 May 27;12(1):8967. doi: 10.1038/s41598-022-13167-4.
Although stretchable electroluminescent (EL) devices have been the research hotspots for decades because of their enormous market value in lighting sources and displays, fabrication of the stretchable EL device through a simple, cost-effective, and scalable method still remains an open issue. Here, a novel all solution-processed method is developed to fabricate a high-performance alternative current electroluminescent (ACEL) device based on copper nanowires (Cu NWs). The Cu NW-based electrode exhibited a low resistance change of less than 10% after 1000 stretching cycles at a tensile strain of 30% and the resistance variation of the electrode in one stretching-releasing cycle was less than 1% at the 1000th. To substantiate suitability for the wearable application, the ACEL device was stretched at a tensile strain of 100% and it retained a luminance of 97.6 cd/m. Furthermore, the device works well under different deformations such as bending, folding, rolling, and twisting. To the best of our knowledge, this is the first demonstration of Cu NWs applied in a stretchable ACEL, promising cost-effective electrode materials for various wearable electronics applications.
尽管可拉伸电致发光（EL）器件由于其在光源和显示器方面的巨大市场价值，几十年来一直是研究热点，但通过简单、经济高效且可扩展的方法制造可拉伸EL器件仍然是一个未解决的问题。在此，开发了一种新颖的全溶液处理方法，以制造基于铜纳米线（Cu NWs）的高性能交流电致发光（ACEL）器件。基于Cu NWs的电极在30%拉伸应变下经过1000次拉伸循环后，电阻变化小于10%，在第1000次循环时，电极在一个拉伸-释放循环中的电阻变化小于1%。为了证实其适用于可穿戴应用，ACEL器件在100%拉伸应变下进行拉伸，其亮度保持在97.6 cd/m²。此外，该器件在弯曲、折叠、卷曲和扭转等不同变形下均能正常工作。据我们所知，这是首次展示Cu NWs应用于可拉伸ACEL，有望成为各种可穿戴电子应用中具有成本效益的电极材料。
