Highly Efficient OLEDs

3Luminescent Dinuclear Copper(I) Complexes with Short Intramolecular Cu–Cu Distances

Akira Tsuboyama

Materials R&D Center, R&D Headquarters, Canon, Inc., Tokyo, 146‐8501, Japan

3.1 Introduction

In the past two decades, transition metal complexes have attracted much attention as luminescent dopants of OLED devices. In particular, synthesis of various cyclometalated iridium(III) complexes such as fac‐Ir(ppy)₃ derivatives have been a subject of extensive studies to search phosphorescence emitters for fabrication of the efficient organic light‐emitting diode (OLED) [1]. The phosphorescence emitters are able to capture both the singlet and triplet excitons generated electrochemically in the devices, leading to internal quantum efficiency of 100%. ...