Water-based 2D-crystal Inks: From formulation engineering to printed devices

摘要

The electronics industry has been dominated by metals and complementary metal-oxide-semiconductor (CMOS) technology. However, constraints related to materials choice clearly appear in transparent and flexible electronics, heat management and rapid customisation - all of which present challenges to traditional fabrication methods. As a consequence of this need, the field of printable electronics has initially developed after the introduction of conductive polymers, allowing simple, versatile, and low cost techniques, such as inkjet printing, to be used for manufacturing of functional devices [1-2]. The advent of 2-Dimensional (2D) materials [3] show promise in this regard as they can be easily solution processed by using a mass scalable and low cost method, called Liquid-Phase Exfoliation [4]. 2D materials shows great promise for use in flexible electronics because their atomic thickness allows for maximum electrostatic control, optical transparency, sensitivity and mechanical flexibility [5]. In addition, different 2D crystals can be easily combined in one stack, offering unprecedented control on the performance and functionalities of the resulting heterostructure device [3].