Kyulux, Inc.

Kyushu University

Hodogaya Chemical Co., Ltd.

Tetsuya Nakagawa

Chihaya Adachi

Hiroko Nomura

Takuma Yasuda

Katsuyuki Shizu

Keiro Nasu

Hiroshi Ookuma

Jie Li

Saeyoun Lee

Gabor Mehes

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 delayed fluorescence material comprising a compound represented by the general formula below. At least one of Rto Rrepresent an electron-donating group and the others represent a hydrogen atom; at least one of Rto Rrepresent an electron-withdrawing group and the others represent a hydrogen atom. 

Delayed-fluorescence material and organic electroluminescence element using same

The compound represented by the following general formula is useful as a light-emitting material for an organic light-emitting device. Z, Zand Zin the following general formula each independently represent a substituent. 

Light-emitting material, and organic light-emitting element

An organic electroluminescence element in which a compound represented by the general formula below is used in a light-emitting layer exhibits a high emission efficiency and is inexpensive to provide. At least one of Rto Rand Rrepresent an electron-donating group and the others represent a hydrogen atom; at least one of Rto Rrepresent an electron-withdrawing group that does not have an unshared electron pair at the &#x3b1;-position thereof and the others represent a hydrogen atom; Z represents a single bond or &#x3e;C&#x2550;Y; Y represents O, S, C(CN)or C(COOH); provided that when Z is a single bond, then at least one of Rto Ris an electron-withdrawing group that does not have an unshared electron pair at the &#x3b1;-position thereof. 

Organic electroluminescence element and compound used therein

An organic light-emitting device containing a compound represented by the following general formula in a light light-emitting layer has a high light-emission efficiency. The ring containing Y, Yand Yrepresent a triazine ring or a pyrimidine ring; Z, Zand Rto Rrepresent a hydrogen atom or a substituent; and at least one of Rto Rrepresents a diarylamino group or a carbazolyl group. The compound represented by the general formula (1) contains at least two carbazole structures in the molecule thereof. 

Growing community of inventors

Fukuoka, Japan

Tetsuya Nakagawa