Ultrathin Metal films for Transparent Electrodes of Flexible Optoelectronic Devices

Yun, Jungheum

doi:10.1002/adfm.201606641

Cited by 263 publications

(255 citation statements)

References 232 publications

(353 reference statements)

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“…Even after completing the growth and transfer of the metal electrode, the Raman spectrum of the graphene template was found to be comparable to that of the initial graphene (Figure j, and D map image in Figure S19, Supporting Information), indicating no degradation in quality of the graphene template during the growth/transfer process. These results showed the ability to use graphene as a recyclable template, and hence the advantage of our approach over previously reported strategies involving metal “wetting inducers” such as buffer layers …”

mentioning

confidence: 54%

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Chae

Jang

Lee

et al. 2018

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Controlled nucleation and growth of metal clusters in metal deposition processes is a long-standing issue for thin-film-based electronic devices. When metal atoms are deposited on solid surfaces, unintended defects sites always lead to a heterogeneous nucleation, resulting in a spatially nonuniform nucleation with irregular growth rates for individual nuclei, resulting in a rough film that requires a thicker film to be deposited to reach the percolation threshold. In the present study, it is shown that substrate-supported graphene promotes the lateral 2D growth of metal atoms on the graphene. Transmission electron microscopy reveals that 2D metallic single crystals are grown epitaxially on supported graphene surfaces while a pristine graphene layer hardly yields any metal nucleation. A surface energy barrier calculation based on density functional theory predicts a suppression of diffusion of metal atoms on electronically perturbed graphene (supported graphene). 2D single Au crystals grown on supported graphene surfaces exhibit unusual near-infrared plasmonic resonance, and the unique 2D growth of metal crystals and self-healing nature of graphene lead to the formation of ultrathin, semitransparent, and biodegradable metallic thin films that could be utilized in various biomedical applications.

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confidence: 54%

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Chae

Jang

Lee

et al. 2018

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“…Overall, the above results demonstrated smooth cellophane substrate combined with OMO transparent electrode in place of PET/ITO did not significantly sacrifice the performance of PSCs. As far as we know, the best reported efficiency of PSCs directly fabricated on paper was 3.8% ± 0.2%, therefore, the best efficiency of PSCs on cellophane (PCE = 5.94%) obtained here was the highest efficiency so far for the PSCs directly prepared on paper substrate.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast with them, the emerging ultrathin Ag with oxide/Ag/oxide (OMO) tri‐layer structure would be one of good options due to its ease of preparation by vacuum deposition and protection Ag from chemical corrosion by oxide barrier . Recently, the growth of ultrathin Ag with a continuous and smooth surface was realized, which had a thickness of less than the skin‐depth, providing it with high conductivity and semi‐transparency. Preserving the conductivity, improvement of transparency could be achieved by sandwiching ultrathin Ag between two oxide layers, which made it be good candidate for foldable transparent electrodes .…”

Section: Introductionmentioning

confidence: 99%

Realization of Foldable Polymer Solar Cells Using Ultrathin Cellophane Substrates and ZnO/Ag/ZnO Transparent Electrodes

Liu

Wang

et al. 2018

Solar RRL

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Foldable solar cells have attracted increasing attention for portable and wearable applications. The challenge to achieve foldability is free from the formation of cracks under large strain. Our mechanical simulations suggests that a reduction in substrate thickness from 150 to 25 μm is a means to mitigate the strain in polymer solar cells under folding with extremely small curvature radius of sub‐millimeter. The polymer solar cells are experimentally prepared on ultrathin 25 μm cellophane substrates with ZnO/ultrathin Ag/ZnO (OMO) transparent electrodes, instead of conventional ITO, composing a typical device structure, cellophane/OMO/ZnO/PTB7‐Th:PC71BM/MoO3/Al. The solar cells exhibit a power conversion efficiency of 5.94% and a power weight ratio of 2.11 W g−1. After folding the solar cells for 35 cycles, the conversion efficiency still maintained 92% of the initial value, which is mainly ascribed to the synergistic effects of ultrathin substrates and the OMO electrodes, as inferred from the stable resistance of the cellophane/ZnO/ultrathin Ag/ZnO even after 50 folding cycles. This work paves the way toward realizing superior foldability not only in solar cells, but also in other optoelectronic devices.

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“…Metal candidates for ultra-thin metal electrodes are mainly Ag and Cu. Ag is the most commonly used film material because it has the lowest electrical resistance and optical loss in the visible spectrum of known metals [32].…”

Section: Ultra-thin Metal Filmsmentioning

confidence: 99%

Optically Transparent Nano-Patterned Antennas: A Review and Future Directions

et al. 2018

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Transparent antennas have been continuously developed for integration with solar cells, vehicular communications, and ultra-high-speed communications such as 5G in recent years. A transparent antenna takes advantage of spatial extensibility more so than all other antennas in terms of wide range of usable area. In addition, the production price of transparent antennas is steadily decreasing due to the development of nano-process technology. This paper reviews published studies of transparent antennas classified by various materials in terms of optical transmittance and electrical, sheet resistance. The transparent electrodes for the transparent antenna are logically classified and the transparent antennas are described according to the characteristics of each electrode. Finally, the contributions transparent antennas can make toward next-generation 5G high-speed communication are discussed.

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Ultrathin Metal films for Transparent Electrodes of Flexible Optoelectronic Devices

Cited by 263 publications

References 232 publications

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Ultrathin Metal Crystals: Growth on Supported Graphene Surfaces and Applications

Realization of Foldable Polymer Solar Cells Using Ultrathin Cellophane Substrates and ZnO/Ag/ZnO Transparent Electrodes

Optically Transparent Nano-Patterned Antennas: A Review and Future Directions

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