Large-area Flexible Carbon Nanofilms with Synergistically Enhanced Transmittance and Conductivity Prepared by Reorganizing Single-walled Carbon Nanotube Networks.

Large-area flexible transparent conductive films (TCFs) are highly desired for future electronic devices. Nanocarbon TCFs (NC-TCFs) are one of the most promising candidates, but some of their properties are mutually restricted. Here, a novel carbon nanotube network reorganization (CNNR) strategy, i.e., facet-driven CNNR (FD-CNNR) technique, is presented to overcome this intractable contradiction. The FD-CNNR technique basically introduces an interaction between single-walled carbon nanotube (SWNT) and Cu-O. Based on the unique FD-CNNR mechanism, large-area flexible reorganized carbon nanofilms (RNC-TCFs) are designed and fabricated with A3-size and even meter-length, including reorganized SWNT (RSWNT) films and graphene and reorganized SWNT (G-RSWNT) hybrid films. Synergistical improvement in strength, transmittance and conductivity of flexible RNC-TCFs has been achieved. The G-RSWNT TCF shows a sheet resistance as low as 69 Ω sq -1 at 86% transmittance, FOM value of 35, and Young's modulus of ∼45 MPa. The high strength enables RNC-TCFs to be freestanding on water and easily transferred to any target substrate without contamination. An A4-size flexible smart window is fabricated, which manifests controllable dimming and fog removal. The FD-CNNR technique can be extended to large-area or even large-scale fabrication of TCFs, and can provide new insights into design of TCFs and other functional films. This article is protected by copyright. All rights reserved.