Emission Control for Organic Light-emitting Electrochemical Cell Using Ruthenium Complex by Redox Potential

Abstract

A novel concept for the light-emitting electrochemical transistor (LECT) which consists of the electrochemical light-emitting cell (LEC) and the electrochemical transistor (ECT) was introduced. The four-electrode electrochemical system using interdigitated array (IDA) electrodes was employed to demonstrate the concept of LECT in solution. Cyclic voltammetric (CV) measurement was carried out in solution containing Ru(bpy)3(PF6)2 as redox species and a light-emitting material. We confirmed that the light emission was controlled at the electrode potential difference between both fingers of IDA electrodes.