CUED Publications database

A general ink formulation of 2D crystals for wafer-scale inkjet printing

Hu, G and Yang, L and Yang, Z and Wang, Y and Jin, X and Dai, J and Wu, Q and Liu, S and Zhu, X and Wang, X and Wu, TC and Howe, RCT and Albrow-Owen, T and Ng, LWT and Yang, Q and Occhipinti, LG and Woodward, RI and Kelleher, EJR and Sun, Z and Huang, X and Zhang, M and Bain, CD and Hasan, T (2020) A general ink formulation of 2D crystals for wafer-scale inkjet printing. Science Advances, 6. eaba5029-.

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Recent advances in inkjet printing of two-dimensional (2D) crystals show great promise for next-generation printed electronics development. Printing nonuniformity, however, results in poor reproducibility in device performance and remains a major impediment to their large-scale manufacturing. At the heart of this challenge lies the coffee-ring effect (CRE), ring-shaped nonuniform deposits formed during postdeposition drying. We present an experimental study of the drying mechanism of a binary solvent ink formulation. We show that Marangoni-enhanced spreading in this formulation inhibits contact line pinning and deforms the droplet shape to naturally suppress the capillary flows that give rise to the CRE. This general formulation supports uniform deposition of 2D crystals and their derivatives, enabling scalable and even wafer-scale device fabrication, moving them closer to industrial-level additive manufacturing.

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Unnamed user with email
Date Deposited: 19 Jun 2020 21:21
Last Modified: 09 Sep 2021 03:13
DOI: 10.1126/sciadv.aba5029