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.

Keywords:

• Light-emitting electrochemical transistor (LECT)
• Ruthenium complex
• Light-emitting electrochemical cell (LEC)
• Electrochemical transistor (ECT)

Acknowledgment

This work was partly supported by Grant-in-Aid for Scientific Research (C) (25410249) from Japan Society for the Promotion of Science.