Kyulux, Inc.

Kyushu University

Kwansei Gakuin Educational Foundation

Hiroki Noda

Chihaya Adachi

Hiroyuki Tanaka

Hajime Nakanotani

Katsuyuki Shizu

Masatsugu Taneda

Yoshitake Suzuki

Naoto Notsuka

Hiroko Nomura

Yasuyuki Sasada

Takuji Hatakeyama

Ayataka Endo

Yasuhiro Kondo

Ping Kuen Daniel Tsang

Masaki Tanaka

Motoki Yanai

Chin-Yiu Chan

Using a compound represented by a general formula (A)m-L-(D)n, a light-emitting device having a high emission efficiency can be provided. L is an (m+n)-valent aromatic linking group; A is a group having a positive Hammett's σvalue; D is a group having a negative Hammett's σvalue; m is an integer of 1 or more; n is an integer of 2 or more. Two of plural D's differ in point of the substituent condition at specific aromatic rings.

Compound, light-emitting material and light-emitting element

An organic electroluminescent device having an anode, a cathode, and a light-emitting layer between the anode and the cathode, wherein the light-emitting layer contains at least a first organic compound, a second organic compound and a third organic compound satisfying the following formula (A), the second organic compound is a delayed fluorescent material, and the third organic compound is a light-emitting material, has a high light emission efficiency. Formula (A): E(A)>E(B)>E(C) wherein E(A), E(B) and E(C) each represent a lowest excited singlet energy level of the first organic compound, the second organic compound and the third organic compound, respectively.

Organic electroluminescence element

An organic light-emitting device containing both a compound represented by the following general formula (1) and a compound represented by the following general formula (2) has a high light emission efficiency. The rings a to c each are a benzene ring that can be optionally condensed, Rand Reach represent a substituted or unsubstituted aryl group, etc., four of Rto Reach are a substituted or unsubstituted carbazol-9-yl group, but all of these four are not the same, and the remaining one is a hydrogen atom, a cyano group, etc.

Organic light emitting element, composition and membrane

A light-emitting material containing a compound represented by the general formula (1) is capable of achieving an excellent external quantum efficiency on using in an organic light-emitting device. Rto Rrepresent a hydrogen atom or a substituent, provided that at least one of Rto Rrepresents a substituted or unsubstituted carbazolyl group; and Arto Arrepresent a substituted or unsubstituted aromatic ring or heteroaromatic ring. 

Light-emitting material, and delayed fluorescent emitter and organic light-emitting device using same

A compound represented by the general formula (1) is useful as a light-emitting material. R, R, and Reach represent a cyano group, or R, R, R, and Reach represent a cyano group; and the others of Rto Reach represent a group represented by any one of the following general formula (4), etc. 

Light-emitting material, organic light-emitting device, and compound

A compound represented by the general formula (1) is useful as a light-emitting material. In the general formula (1), Arto Areach represent a substituted or unsubstituted aryl group, provided that at least one of Arto Areach represent a carbazolyl group having an N-position substituted with a group containing an electron withdrawing group. 

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Fukuoka, Japan

Hiroki Noda