Polymeric Acid-doped Carbon Nanotube-based Indium-free Organic Solar Cells thatshow Excellent Stability and Doping Durability

摘要

Transparent electrodes are vital components for touch panels, displays, and photovoltaic cells. Widelyused indium tin oxide (ITO) transparent electrodes are not suitable for use in flexible electronics because oftheir brittleness, high cost, and diffusion of impurities within devices. Carbon nanotube (CNT) has shownconsiderable promise as replacements for ITO-based electrodes, but they fall short in terms of conductivity.To offset this weakness, dopants are used to increase the conductivity by increasing the concentration of freecarriers and reducing the resistance. As reported by Lee and colleagues, trifluoromethanesulfonic acid(TFMS) displayed nearly ideal durability when used to dope graphene in organic light emitting diodes.However, TFMS nonetheless does not exhibit permanent durability and has an issue regarding handlingsafety when used as a dopant in carbon electrodes.