Solution-processable multi-color printing using UV nanoimprint lithography

Seungho Baek, Kwan Kim, Younghoon Sung, Pilhoon Jung, Sucheol Ju, Wonjoong Kim, Soo Jung Kim, Sung Hoon Hong, Heon Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Recently, coloring based on nanostructure-light interaction has attracted much attention, because it has many advantages over pigment-based conventional coloring in terms of being non-toxic and highly durable in the environment, and providing high resolution. The asymmetric Fabry-Perot (FP) cavity absorber is the most manufacturable structure among coloring structures because it is simply produced and easily tunable. However, it cannot be applied practically because of the lack of a manufacturing technique that enables simultaneous fabrication of multi-color structures with different heights. Here, the fabrication of colored reflective characters based on various asymmetric FP absorbers with micrometer-scale pixel size are reported. Various cavities with different thicknesses are fabricated in a single step using UV imprint lithography and a simple deposition process. UV/visible spectroscopy is used to characterize the fabricated FP resonator. This absorber demonstrates high absorption, close to 90%, resulting in vivid colors with high resolution of 12700 DPI. It can be potentially used in reflective color displays field, functionalized color decorations, and security color patterns area. It is believed that this study would open up new possibilities for high density color printing in practical industry by introducing cost effective nanoimprint lithography technology.

Original languageEnglish
Article number125301
JournalNanotechnology
Volume31
Issue number12
DOIs
Publication statusPublished - 2020 Jan 7

Keywords

  • broadband absorber
  • Fabry-Perot
  • nanoimprint lithography
  • reflective color
  • solutionprocessable

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Baek, S., Kim, K., Sung, Y., Jung, P., Ju, S., Kim, W., Kim, S. J., Hong, S. H., & Lee, H. (2020). Solution-processable multi-color printing using UV nanoimprint lithography. Nanotechnology, 31(12), [125301]. https://doi.org/10.1088/1361-6528/ab5d42