4Molecular Design and Synthesis of Metal Complexes as Emitters for TADF‐Type OLEDs

Masahisa Osawa and Mikio Hoshino

RIKEN, 2‐1 Hirosawa, Wako, 351‐0198 Saitama, Japan

4.1 Introduction

Nowadays advances in the organic light‐emitting diode (OLED) technology have promoted the commercialization of new light sources for mercury‐free lighting, flat‐panel displays, and smartphones. Practical applications of OLEDs have been realized not only because of the successful synthesis of new emissive substances and peripheral materials but also because of the significant progress in processing technology. Furthermore, extensive research in device chemistry and physics has accelerated the commercialization of OLEDs.

In 1987, Tang and Van Slyke reported the fabrication ...

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