The Effect of 2D Nanosheet Size on the Performance of Printed Devices

Printed networks of materials such as few layer MoS2 enable the production of low-cost but poorer performance devices. This poor performance is due to low nanosheet network mobility of about 0.1 cm2/Vs, this is in part due to inter-nanosheet junctions. To improve network mobility of printed networks, we must better understand these junctions. To achieve this, this project sees the development of size-controlled networks by separating nanosheets into discrete size selected samples.<br/>Recently developed Electrochemical Pellet Intercalation (ECPI) methods enable the scalable exfoliation of nanosheets from cheap, widely available powders. The development of size-controlled networks from commercially available powders via ECPI could transform access to the development of 2D material-based device development. [1,2]<br/>The electrical performance of these networks is characterised, and these measurements are used to refine printing parameters to optimise network morphology, toward reducing junction resistance and thus improving mobility. Applying this knowledge, transistors are developed using these optimised networks and their performance assessed. [3]