Transparent, Conductive,\nand Flexible Multiwalled\nCarbon Nanotube/Graphene Hybrid Electrodes with Two Three-Dimensional\nMicrostructures

Abstract

Transparent, conductive, and flexible multiwalled carbon\nnanotube\n(MWCNT)/graphene hybrids with two three-dimensional microstructuresan\ninterconnected network and a double-layer structurewere prepared.\nThe conductivity and performance of MWCNT/graphene films can be controlled\nby different microstructures. A photoswitch using a layered heterostructure\nof a CdTe quantum dot on an interconnected MWCNT/graphene (IN-MWCNT/graphene)\nelectrode shows an enhanced reversible photocurrent with a higher\non/off ratio than that of double-layer structures (DL-MWCNT/graphene).\nElectrochemical capacitors using a IN-MWCNT/graphene network also\nexhibit an outstanding rate capability and good cycling stability\ndue to a large surface area and high porosity. Results indicate that\nthe IN-MWCNT/graphene hybrid with porous structures and strong π-interaction\nis an excellent conductive network for multifunctional flexible devices.\nThe performance of MWCNT/graphene hybrid films can be further optimized\nby the improved interface and microstructures.