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Journal Article Synergetic Effects of Ligand Exchange and Reduction Process Enhancing both Electrical and Optical Properties of Ag Nanocrystals for Multifunctional Transparent Electrodes
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Authors
Min Su Kang, Hyungmok Joh, Haneun Kim, Hye-Won Yun, Donggyu Kim, Ho Kun Woo, Woo Seok Lee, Sung-Hoon Hong, Soong Ju Oh
Issue Date
2018-10
Citation
Nanoscale, v.10, no.38, pp.18415-18422
ISSN
2040-3364
Publisher
Royal Society of Chemistry (RSC)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1039/c8nr05212c
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 廓 ?뼞?닋1), high optical transmittance (94.7%), and the highest figure of merit (FOM) of 6.37 × 10?닋2. 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.
KSP Keywords
Ag nanocrystals, Chemical method, Combinatorial analysis, Conductive thin films, Figure of Merit(FoM), Flexible transparent heaters, Highly transparent, Ligand exchange(LE), Low-cost, Metallic compounds, Nano-mesh