State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China.
Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China.
Nanoscale. 2017 Mar 30;9(13):4324-4365. doi: 10.1039/c7nr00844a.
Following the development of many novel two-dimensional (2D) materials, investigations of van der Waals heterojunctions (vdWHs) have attracted significant attention due to their excellent properties such as smooth heterointerface, highly gate-tunable bandgap, and ultrafast carrier transport. Benefits from the atom-scale thickness, physical and chemical properties and ease of manipulation of the heterojunctions formulated by weak vdW forces were demonstrated to indicate their outstanding potential in electronic and optoelectronic applications, including photodetection and energy harvesting, and the possibility of integrating them with the existing semiconductor technology for the next-generation electronic and sensing devices. In this review, we summarized the recent developments of vdWHs and emphasized their applications. Basically, we introduced the physical properties and some newly discovered phenomena in vdWHs. Then, we emphatically presented four classical vdWHs and some novel heterostructures formed by vdW forces. Based on their unique physical properties and structures, we highlighted the applications of vdWHs including in photodiodes, phototransistors, tunneling devices, and memory devices. Finally, we provided a conclusion on the recent advances in vdWHs and outlined our perspectives. We aim for this review to serve as a solid foundation in this field and to pave the way for future research on vdW-based materials and their heterostructures.
在开发出许多新型二维（2D）材料之后，由于范德华异质结（vdWH）具有出色的性能，例如平滑的异质界面、高度可栅控的带隙和超快的载流子输运，因此对其的研究引起了广泛关注。得益于由弱范德华力形成的异质结的原子级厚度、物理和化学性质以及易于操控性，这些异质结在包括光电探测和能量收集在内的电子和光电子应用中显示出了卓越的潜力，并且有可能将其与现有的半导体技术集成，用于下一代电子和传感设备。在这篇综述中，我们总结了 vdWH 的最新发展，并强调了它们的应用。基本上，我们介绍了 vdWH 的物理性质和一些新发现的现象。然后，我们着重介绍了四种经典的 vdWH 和一些由范德华力形成的新型异质结构。基于它们独特的物理性质和结构，我们强调了 vdWH 在光电二极管、光电晶体管、隧道器件和存储器件等方面的应用。最后，我们对 vdWH 的最新进展进行了总结，并概述了我们的观点。我们希望这篇综述能成为该领域的坚实基础，并为基于范德华力的材料及其异质结构的未来研究铺平道路。
