Hodogaya Chemical Co., Ltd.

Kyulux, Inc.

Hiroshi Ookuma

Norimasa Yokoyama

Shuichi Hayashi

Chihaya Adachi

Eiji Takahashi

Takuma Yasuda

Makoto Nagaoka

Katsuyuki Shizu

Kazuyuki Suruga

Daizou Kanda

Tetsuya Nakagawa

Sawa Izumi

A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The spiro compound of a general formula (1) having an azafluorene ring structure is used as a constituent material of at least one organic layer in an organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes. 

Spiro compound having azafluorene ring structure, light-emitting material, and organic electroluminescent device

A compound having an indolocarbazole ring structure is represented by the following general formula (1), and is used as a material for forming a highly efficient and highly durable organic electroluminescent device. The compound features excellent hole injection/transport capability, has electron blocking power and is highly stable in the form of a thin film. 

Compound having an indolocarbazole ring structure and organic electroluminescent device

An organic electroluminescent device comprises, between an anode and a cathode, a hole injection layer, a hole-transporting layer, a luminous layer and an electron-transporting layer, wherein the hole injection layer contains an arylamine compound (&#x3b1;) having three or more triphenylamine skeletons, the hole-transporting layer contains an arylamine compound (&#x3b2;) having two triphenylamine skeletons, and the electron-transporting layer contains an electron-transporting compound having an anthracene ring skeleton and a pyridoindole ring skeleton. The organic EL device emits light highly efficiently, drives on a low voltage, and features excellent durability and long life.

Organic electroluminescent device

Growing community of inventors

Tokyo, Japan

Hiroshi Ookuma