Sequentially Coated Wavy Nanowire Composite Transparent Electrode for Stretchable Solar Cells

Hyun Jeong Kwon, Geon U. Kim, Chulhee Lim, Jai Kyeong Kim, Sang-Soo Lee, Jinhan Cho, Hyung Jun Koo, Bumjoon J. Kim, Kookheon Char, Jeong Gon Son

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Recent advances in fabricating stretchable and transparent electrodes have led to various techniques for establishing next-generation form-factor optoelectronic devices. Wavy Ag nanowire networks with large curvature radii are promising platforms as stretchable and transparent electrodes due to their high electrical conductivity and stretchability even at very high transparency. However, there are disadvantages such as intrinsic nonregular conductivity, large surface roughness, and nanowire oxidation in air. Here, we introduce electrically synergistic but mechanically independent composite electrodes by sequentially introducing conducting polymers and ionic liquids into the wavy Ag nanowire network to maintain the superior performance of the stretchable transparent electrode while ensuring overall conductivity, lower roughness, and long-term stability. In particular, plenty of ionic liquids can be incorporated into the uniformly coated conducting polymer so that the elastic modulus can be significantly lowered and sliding can occur at the nanowire interface, thereby obtaining the high mechanical stretchability of the composite electrode. Finally, as a result of applying the composite film as the stretchable transparent electrode of stretchable organic solar cells, the organic solar cell exhibits a high power conversion efficiency of 11.3% and 89% compared to the initial efficiency even at 20% tensile strain, demonstrating excellent stretching stability.

Original languageEnglish
Pages (from-to)13656-13667
Number of pages12
JournalACS Applied Materials and Interfaces
Volume15
Issue number10
DOIs
Publication statusPublished - 2023 Mar 15

Bibliographical note

Funding Information:
The authors gratefully acknowledge financial support from the Korea Institute of Science and Technology (KIST) Institutional Program (Project Nos. 2E32501 and 2E32503), KU-KIST program and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (Nos. 2022R1A2B5B02001597, 2017M3D1A1039553, 2020M3D1A1110499, 2020M3D1A2101799, and 2020M3D1A2101800).

Publisher Copyright:
© 2023 American Chemical Society

Keywords

  • conducting polymer
  • ionic liquid
  • stretchable composite electrode
  • stretchable transparent electrode
  • wavy Ag nanowire network

ASJC Scopus subject areas

  • General Materials Science

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