Nie Bangbang, Li Xiangming, Wang Chunhui, Liu Haoran, Tian Hongmiao, Chen Xiaoliang, Shao Jinyou
Micro- and Nano-technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
ACS Appl Mater Interfaces. 2020 Sep 30;12(39):43892-43900. doi: 10.1021/acsami.0c10132. Epub 2020 Aug 27.
In the areas of flexible displays and wearable devices, double-sided light-emitting devices have huge commercial applications. Here, we provide a novel form of flexible double-sided light-emitting devices by designing and manufacturing different transparent interdigital electrodes for lighting the structural areas of composite emitting layers. The transparent interdigital electrodes are fabricated by embedding multiwalled carbon nanotubes in interdigital mesh-structured microcavities using a doctor-blading process, and the emitting layers are fabricated by mixing copper-doped zinc sulfide (ZnS/Cu) phosphor particles with the transparent polydimethylsiloxane polymer. The fabricated double-sided light-emitting devices could be in the crimp state, exhibiting excellent flexibility. By designing the structure of the interdigital electrodes and the thickness of the emitting layers, the double-sided emission intensity of the light-emitting devices can be adjusted. Furthermore, based on the flexible double-sided light-emitting devices, various patterns can be successfully programed, such as the digital, grayscale, and ancient Chinese walls. The flexible and programmable double-sided light-emitting films provide a promising strategy for the next generation of customized flexible displays.
在柔性显示器和可穿戴设备领域，双面发光器件具有巨大的商业应用价值。在此，我们通过设计和制造不同的透明叉指电极来点亮复合发光层的结构区域，从而提供了一种新型的柔性双面发光器件。透明叉指电极是通过刮涂工艺将多壁碳纳米管嵌入叉指网状微腔中制成的，而发光层则是通过将铜掺杂硫化锌（ZnS/Cu）荧光粉颗粒与透明聚二甲基硅氧烷聚合物混合制成的。所制备的双面发光器件可以处于卷曲状态，展现出优异的柔韧性。通过设计叉指电极的结构和发光层的厚度，可以调节发光器件的双面发光强度。此外，基于柔性双面发光器件，可以成功地编程各种图案，如数字、灰度和中国古代城墙图案。这种柔性且可编程的双面发光薄膜为下一代定制柔性显示器提供了一种很有前景的策略。
