Cite this article as: |
Huihui Yu, Zhihong Cao, Zheng Zhang, Xiankun Zhang, and Yue Zhang, Flexible electronics and optoelectronics of 2D van der Waals materials, Int. J. Miner. Metall. Mater., 29(2022), No. 4, pp. 671-690. https://doi.org/10.1007/s12613-022-2426-3 |
张先坤 E-mail: zhangxiankun@ustb.edu.cn
张跃 E-mail: yuezhang@ustb.edu.cn
由于良好的形状适应性,柔性电子及光电子器件在医疗健康、电子皮肤、自动驾驶、可折叠屏以及各种可穿戴电子设备等未来智能工业中展现出独特的优势。然而,随着传统半导体材料柔性电子及光电器件的尺寸不断减小,异质结界面晶格失配导致的界面散射现象愈发明显,使得材料和器件的性能衰退严重,无法满足柔性电子及光电子器件小型化的需求;同时,传统材料杨氏模量较小和应变极限范围小导致其形状自适应性较差,也阻碍了柔性可穿戴电子器件多种功能的实现。二维范德华材料具有更大的比表面积、无悬挂键的表面、层间弱范德华作用力、优异电学和光电性能以及良好的机械性能;可以在不考虑考虑晶格失配的情况下,通过外延生长或者机械堆垛的方式构筑范德华异质结。因此,二维范德华材料在未来柔性智能设备的多功能器件应用中具有独特的优势。经过了十几年的发展,基于二维范德华材料及其范德华异质结的电子与光电器件功能和性能日趋完善,涌现出多种新材料体系和新结构器件。在这篇综述中,我们首先分析了二维范德华材料及其异质结在构筑柔性器件中的物理性质及结构优势,并从器件功能化以及材料体系角度出发,归纳了近年来二维柔性先进电子及光电子器件的研究进展,展望了二维范德华材料在柔性电子及光电子学中面临的挑战及未来的发展方向。
Flexible electronics and optoelectronics exhibit inevitable trends in next-generation intelligent industries, including healthcare and wellness, electronic skins, the automotive industry, and foldable or rollable displays. Traditional bulk-material-based flexible devices considerably rely on lattice-matched crystal structures and are usually plagued by unavoidable chemical disorders at the interface. Two-dimensional van der Waals materials (2D VdWMs) have exceptional multifunctional properties, including large specific area, dangling-bond-free interface, plane-to-plane van der Waals interactions, and excellent mechanical, electrical, and optical properties. Thus, 2D VdWMs have considerable application potential in functional intelligent flexible devices. To utilize the unique properties of 2D VdWMs and their van der Waals heterostructures, new designs and configurations of electronics and optoelectronics have emerged. However, these new designs and configurations do not consider lattice mismatch and process incompatibility issues. In this review, we summarized the recently reported 2D VdWM-based flexible electronic and optoelectronic devices with various functions thoroughly. Moreover, we identified the challenges and opportunities for further applications of 2D VdWM-based flexible electronics and optoelectronics.
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