High-Resolution and Large-Area Patterning of Highly Conductive Silver Nanowire Electrodes by Reverse Offset Printing and Intense Pulsed Light Irradiation

Kyutae Park, Kyoohee Woo, Jongyoun Kim, Donghwa Lee, Yumi Ahn, Dongha Song, Honggi Kim, Dongho Oh, Sin Kwon, Youngu Lee

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Conventional printing technologies such as inkjet, screen, and gravure printing have been used to fabricate patterns of silver nanowire (AgNW) transparent conducting electrodes (TCEs) for a variety of electronic devices. However, they have critical limitations in achieving micrometer-scale fine line width, uniform thickness, sharp line edge, and pattering of various shapes. Moreover, the optical and electrical properties of printed AgNW patterns do not satisfy the performance required by flexible integrated electronic devices. Here, we report a high-resolution and large-area patterning of highly conductive AgNW TCEs by reverse offset printing and intense pulsed light (IPL) irradiation for flexible integrated electronic devices. A conductive AgNW ink for reverse offset printing is prepared by carefully adjusting the composition of AgNW content, solvents, surface energy modifiers, and organic binders for the first time. High-quality and high-resolution AgNW micropatterns with various shapes and line widths are successfully achieved on a large-area plastic substrate (120 × 100 mm 2 ) by optimizing the process parameters of reverse offset printing. The reverse offset printed AgNW micropatterns exhibit superior fine line widths (up to 6 μm) and excellent pattern quality such as sharp line edge, fine line spacing, effective wire junction connection, and smooth film roughness. They are post-processed with IPL irradiation, thereby realizing excellent optical, electrical, and mechanical properties. Furthermore, flexible OLEDs and heaters based on reverse offset printed AgNW micropatterns are successfully fabricated and characterized, demonstrating the potential use of the reverse offset printing for the conductive AgNW ink.

Original languageEnglish
Pages (from-to)14882-14891
Number of pages10
JournalACS Applied Materials and Interfaces
Volume11
Issue number16
DOIs
StatePublished - 24 Apr 2019

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

Keywords

  • high-resolution
  • intense pulsed light irradiation
  • patterning
  • reverse offset printing
  • silver nanowire

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