A graphene mesh as a hybrid electrode for foldable devices
| العنوان: | A graphene mesh as a hybrid electrode for foldable devices |
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| المؤلفون: | Weon Ho Shin, Woo Yun-Sung, Jung Yeon Won, Hiesang Sohn, E. H. Cho, Chan Kwak, Mun Ja Kim, Chang Seung Lee, Yung-soo Kim |
| المصدر: | Nanoscale. 10:628-638 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Materials science, Graphene, 02 engineering and technology, Substrate (electronics), 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, law.invention, law, Electrode, Transmittance, Polymer substrate, General Materials Science, Composite material, Photolithography, 0210 nano-technology, Layer (electronics), Sheet resistance |
| الوصف: | A graphene mesh with arrays of micro-holes was fabricated on a polymer substrate using photolithography for use as an electrode in flexible devices. The optimal mesh structure with high optical transmittance and electrical conductivity was designed using a finite element method, in which the conductivity of the mesh was simulated as a function of structure, size, and periodicity of the hole array. The sheet resistance of the graphene mesh was lowered to that of a graphene monolayer by chemical doping and found to be 330 Ω Sq−1 at 98.5% transparency. The figure of merit of the doped graphene mesh was calculated to be 106 at 98% transmittance, a value that has not yet been reported for any conventional transparent electrode material. Due to strong bonding between the polymer and substrate, the hybrid electrode composed of a silver nanowire (AgNW)/graphene mesh coated with an over-coating layer exhibited more stable electrical characteristics during mechanical fatigue deformation compared to a hybrid film composed of a AgNW/graphene sheet. The AgNW/graphene sheet underwent breakdown at less than 20 000 cycles in cyclic bending tests with 6.5% strain, but the AgNW/graphene mesh showed a 38% increase in resistance at 20 000 cycles and no breakdown even at 100 000 cycles. Therefore, in this study, we propose a hybrid structure composed of a AgNW/graphene mesh, which is optically and mechanically superior to AgNW/graphene sheets, and therefore suitable for application as a transparent electrode in foldable devices with long-term stability. |
| تدمد: | 2040-3372 2040-3364 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d8468e7f0e0e3f06adb514d5236e351Test https://doi.org/10.1039/c7nr07086aTest |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....6d8468e7f0e0e3f06adb514d5236e351 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20403372 20403364 |
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