NA-ION INTERCALATED HIGHLY TRANSPARENT AND CONDUCTIVE FILMS

Abstract

Transparent conductive films (TCFs) are materials with both high optical transmittance and high electrical conductivity. This thesis focuses on developing high transparent, high conductive, and low-cost transparent conductive films. This thesis reports Na-ion intercalated reduced graphene oxide (Na-RGO) films as low-cost, scalable, high performance transparent conductive films. The interlayer distance of RGO allows for Na-ion intercalation, which causes energy band structure changes and electron doping. As a result, a simultaneous increase in both transmittance and sheet conductivity has been achieved. The visible light transmittance and sheet resistance showed great enhancement from 36%, 83 kΩ/sq to 87%, 311 Ω /sq before and after Na-ion intercalation. The air stability test showed that the optical and electronic properties of Na-RGO films were more stable than Li-ion intercalated graphene. The results demonstrated the great potential of Na-ion intercalated printed RGO films for TCFs applications.