Synergetic effects of ligand exchange and reduction process enhancing both electrical and optical properties of Ag nanocrystals for multifunctional transparent electrodes

Min Su Kang, Hyungmok Joh, Haneun Kim, Hye Won Yun, Donggyu Kim, Ho Kun Woo, Woo Seok Lee, Sung Hoon Hong, Soong Ju Oh

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this work, we introduce a low cost, room-temperature and atmospheric pressure based chemical method to produce highly transparent, conductive, and flexible nano-mesh structured electrodes using Ag nanocrystals (NCs). Sequential treatments of ligand exchange and reduction processes were developed to engineer the optoelectronic properties of Ag NC thin films. Combinatorial analysis indicates that the origin of the relatively low conductivity comes from the non-metallic compounds that are introduced during ligand exchange. The reduction process successfully removed these non-metallic compounds, yielding structurally uniform, optically more transparent, dispersive, and electrically more conductive thin films. We optimized the design of Ag NC thin film mesh structures, and achieved low sheet resistance (9.12 Ω □ −1 ), high optical transmittance (94.7%), and the highest figure of merit (FOM) of 6.37 × 10 −2 . Solution processed flexible transparent heaters, touch pads, and wearable sensors are demonstrated, emphasizing the potential applications of Ag NC transparent electrodes in multifunctional sensors and devices.

Original languageEnglish
Pages (from-to)18415-18422
Number of pages8
JournalNanoscale
Volume10
Issue number38
DOIs
Publication statusPublished - 2018 Oct 14

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Nanocrystals
Ion exchange
Electric properties
Optical properties
Ligands
Electrodes
Thin films
Conductive films
Sheet resistance
Opacity
Optoelectronic devices
Atmospheric pressure
Engineers
Sensors
Costs
Temperature

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Synergetic effects of ligand exchange and reduction process enhancing both electrical and optical properties of Ag nanocrystals for multifunctional transparent electrodes. / Kang, Min Su; Joh, Hyungmok; Kim, Haneun; Yun, Hye Won; Kim, Donggyu; Woo, Ho Kun; Lee, Woo Seok; Hong, Sung Hoon; Oh, Soong Ju.

In: Nanoscale, Vol. 10, No. 38, 14.10.2018, p. 18415-18422.

Research output: Contribution to journalArticle

Kang, Min Su ; Joh, Hyungmok ; Kim, Haneun ; Yun, Hye Won ; Kim, Donggyu ; Woo, Ho Kun ; Lee, Woo Seok ; Hong, Sung Hoon ; Oh, Soong Ju. / Synergetic effects of ligand exchange and reduction process enhancing both electrical and optical properties of Ag nanocrystals for multifunctional transparent electrodes. In: Nanoscale. 2018 ; Vol. 10, No. 38. pp. 18415-18422.
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