Bilayer and three dimensional conductive network composed by SnCl2 reduced rGO with CNTs and GO applied in transparent conductive films

Abstract

Graphene oxide (GO), reduced graphene oxide (rGO) and carbon nanotubes (CNTs) have their own advantages in electrical, optical, thermal and mechanical properties. An effective combination of these materials is ideal for preparing transparent conductive films to replace the traditional indium tin oxide films. At present, the preparation conditions of rGO are usually harsh and some of them have toxic effects. In this paper, an SnCl2/ethanol solution was selected as the reductant because it requires mild reaction conditions and no harmful products are produced. The whole process of rGO preparation was convenient, fast and environmentally friendly. Then, SEM, XPS, Raman, and XRD were used to verify the high reduction efficiency. CNTs were introduced to improve the film conductive property. The transmittance and sheet resistance were the criteria used to choose the reduction time and the content ratios of GO/CNT. Thanks to the post-treatment of nitric acid, not only the by-product (SnO2) and dispersant in the film are removed, but also the doping effect occurs, which are all conducive to reducing the sheet resistances of films. Ultimately, by combining rGO, GO and CNTs, transparent conductive films with a bilayer and three-dimensional structure were prepared, and they exhibited high transmittance and low sheet resistance (58.8 Ω/sq. at 83.45 T%, 47.5 Ω/sq. at 79.07 T%), with corresponding $${{\sigma_{dc} } \mathord{\left/ {\vphantom {{\sigma_{dc} } {\sigma_{opt} }}} \right. \kern-\nulldelimiterspace} {\sigma_{opt} }}$$ σ dc / σ opt values of 33.8 and 31.8, respectively. In addition, GO and rGO can modify the surface and reduce the film surface roughness. The transparent conductive films are expected to be used in photoelectric devices.

Eco-Friendly Scalable Manufacturing Silver Transparent Сonductive Mesh and Silver Micro Caps, in One Technological Cycle for Efficient EMI Shielding Materials for 5G Communications

“…In terms of their optoelectric properties, silver meshes are superior to such materials as CNT [58] and graphene films [57], Ag NW`s films [52,54]. Standing in line with coatings such as Ag NP mesh based on imprint template [35], Ag nanofibers networks [55], being at the same time significantly more environmentally friendly and economical in production.…”

“…On Figure 4a shows the appearance of the T-600 sample, demonstrating its high optical quality and uniformity. [50]; Ag NW/PDMS films [52]; Au nanotrough network [53]; graphene/ Ag NW films [54]; Ag nanofibers network [55]; Ag NP mesh, imprint template [35]; imprint CuNi mesh [56]; doped graphene films [57]; rGO/CNT hybrid films [58] (e).…”

“…Figure 4. Photo silver mesh T-600 (a); Optical transmittance spectra for silver meshes (M-100; M-600; T-100; T-600) (b); Detailed study of the sheet resistance silver mesh M-600 of A4 format on a large sample of points: 3D contour plot of the dependence of sheet resistance on the coordinate (c) and its 2D interpretation with a step of 1 cm (d); Comparison of the optoelectric properties of our silver meshes based on cracked template with literature results: Al mesh, cracked template[50]; Ag NW/PDMS films[52]; Au nanotrough network[53]; graphene/ Ag NW films[54]; Ag nanofibers network[55]; Ag NP mesh, imprint template[35]; imprint CuNi mesh[56]; doped graphene films[57]; rGO/CNT hybrid films[58] (e).…”

Promoting Volumetric Desalination Rate and Capacity via Highly Oriented, Densified Graphene Architectures

“…This indicates that both RDG and HODG3 have oxygen-containing functional groups. The Raman spectra of RDG and HODG3 reveal strong G bands at 1590 cm –1 and D bands at 1350 cm –1 (Figure b). − The I D /I G ratios of RDG and HODG3 are 0.93 and 0.98, respectively, which indicates that HODG3 has more structural defects than RDG owing to the chemical etching of KOH during the hydrothermal process. The energy dispersive X-ray spectroscopy (EDS) results reveal that the oxygen content of HODG3 (22.76%) is higher than that of RDG (18.93%) (Figure c).…”