Patterned Sandwich-Type Silver Nanowire-Based Flexible Electrode by Photolithography

Young Un Kim, Na Yeon Kwon, Su Hong Park, Chai Won Kim, Hong Diem Chau, Mai Ha Hoang, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Silver nanowires (AgNWs) are one of the important flexible electrode material candidates that can replace brittle indium tin oxide (ITO). In this work, we demonstrated novel patterned sandwich-type AgNW-based transparent electrodes easily prepared using the photolithography method for application in flexible devices. A cross-linked underlayer was introduced to increase the adhesion properties between a poly(ethylene terephthalate) substrate and AgNWs, and as a result, a uniform AgNW layer was easily deposited. Finally, the AgNW layer could be easily patterned by introducing a photocross-linkable upper layer without lift-off, dry transfer, and removal methods. A mixture of poly(sodium-4-styrene sulfonate) (PSS-Na+) and 2,4-hexadiyne-1,6-diol (HDD), which is a component of the upper layer, exhibited good cross-linking properties as well as excellent adhesion to the AgNW layer. Through the above method, it was possible to easily fabricate a patterned electrode with smooth surface morphology. Moreover, AgNW-based patterned electrodes exhibit good optical and electrical properties (Rs = 29.8 ω/□, T550 »nm = 94.6%), making them suitable for optoelectronic devices. Flexible polymer solar cells (PSCs) using patterned AgNW electrodes showed a high power conversion efficiency of over 10%, which is comparable to that of PSCs using rigid ITO electrodes. In addition, the high mechanical stability of AgNW-based PSCs was confirmed by bending experiments.

Original languageEnglish
Pages (from-to)61463-61472
Number of pages10
JournalACS Applied Materials and Interfaces
Volume13
Issue number51
DOIs
Publication statusPublished - 2021 Dec 29

Keywords

  • bending stability
  • flexible electrode
  • patterned electrode
  • silver nanowires
  • transparent electrode

ASJC Scopus subject areas

  • Materials Science(all)

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