Farming‐Inspired Continuous Fabrication of Grating Flexible Transparent Film with Anisotropic Conductivity

Abstract

AbstractFlexible transparent conductive films (FTCFs) are critically important for the emerging flexible electronic devices. To this end, FTCFs with conductive gratings have drawn more interests in the past decades. However, there are great challenges to fabricate such FTCFs containing conductive gratings in a facile way. Borrowing the idea from traditional farming, a homemade roll‐to‐roll plowing technique combined with blade coating is proposed to fabricate silver grating FTCFs with anisotropic conductivity in a continuous, cost‐effective, and environmental friendly way. The as‐prepared FTCFs exhibit satisfied optical and electrical properties (i.e., transmittance is 78.2% and sheet resistance is 3.1 Ω □–1). After coated with thin polyvinyl butyral layer through hot‐pressing, it shows a higher transmittance of 84.2% and remarkable mechanical flexibility. Based on the FTCFs with anisotropic conductivity, flexible transparent heater and capacitive keyboard are successfully fabricated. Furthermore, based on such flexible capacitive keyboard, smart wireless controlled human–machine interface system is developed to wirelessly control tablet personal computer working and quadrotor flying. This study provides a promising strategy to fabricate high‐performance FTCFs with anisotropic conductivity via a continuous, cost‐effective, and environmental friendly way.