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

G. Hu, L. Yang, Z. Yang, Y. Wang, X. Jin, J. Dai, Q. Wu, S. Liu, X. Zhu, X. Wang, T.-C. Wu, R. C. T. Howe, T. Albrow-Owen, L. W. T. Ng, Q. Yang, L. G. Occhipinti, R. I. Woodward, E. J. R Kelleher, Z. Sun, X. Huang, M. Zhang, C. D. Bain, T. Hasan: A general ink formulation of 2D crystals for wafer-scale inkjet printing. In: Science Advances, 6 (33), pp. eaba5029, 2020.

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 post-deposition 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.

BibTeX (Download)

@article{Hu2020,
title = {A general ink formulation of 2D crystals for wafer-scale inkjet printing},
author = {G. Hu and L. Yang and Z. Yang and Y. Wang and X. Jin and J. Dai and Q. Wu and S. Liu and X. Zhu and X. Wang and T.-C. Wu and R. C. T. Howe and T. Albrow-Owen and L. W. T. Ng and Q. Yang and L. G. Occhipinti and R. I. Woodward and E. J. R Kelleher and Z. Sun and X. Huang and M. Zhang and C. D. Bain and T. Hasan},
url = {https://www.riwoodward.com/publication_files/hu_2020_ink.pdf},
doi = {10.1126/sciadv.aba5029},
year  = {2020},
date = {2020-08-01},
journal = {Science Advances},
volume = {6},
number = {33},
pages = {eaba5029},
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 post-deposition 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.},
keywords = {nanomaterials},
pubstate = {published},
tppubtype = {article}
}