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

Published version
Peer-reviewed

Type

Article

Change log

Abstract

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.

Description

Keywords

4014 Manufacturing Engineering, 40 Engineering

Journal Title

Sci Adv

Conference Name

Journal ISSN

2375-2548
2375-2548

Volume Title

6

Publisher

American Association for the Advancement of Science (AAAS)
Sponsorship
Engineering and Physical Sciences Research Council (EP/L016087/1)
Royal Society (IE161330)
Technology Strategy Board (102870)
Engineering and Physical Sciences Research Council (EP/G037221/1)
EPSRC (EP/L016087/1, EP/G037221/1, EP/N025245/1) InnovateUK (GraphClean), The Royal Society