摘要:
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 σ p value; D is a group having a negative Hammett's σ p value; 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.
摘要:
An organic electroluminescent device comprising at least two organic layers including a light emitting layer (5) and a delayed fluorescent exciplex layer (7) containing a donor compound and an acceptor compound, between a pair of electrodes (2, 9) is highly efficient in formation of a singlet excited state and enables high light emission efficiency.
摘要:
The compound represented by the following general formula is useful as a light-emitting material for an organic light-emitting device. Z 1 , Z 2 and Z 3 in the following general formula each independently represent a substituent.
摘要:
An organic electroluminescent device having a donor layer containing a donor compound, a spacer layer containing a spacer compound, and an acceptor layer containing an acceptor compound in that order, wherein the donor compound and the acceptor compound are compounds to form an exciplex to radiate delayed fluorescence, and the excited triplet energy of the spacer compound is higher than the excited triplet energy of the exciplex, can be controlled to have different emission wavelengths not requiring change of the combination of the donor compound and the acceptor compound therein.
摘要:
A compound represented by the general formula (1) is useful as a light emitting material. In the general formula (1), Ar 1 to Ar 3 represent an aryl group, provided that Ar 2 and Ar 3 are the same as each other, and at least one of Ar 1 to Ar 3 represents an aryl group substituted with a group represented by the general formula (2). In the general formula (2), R 1 to R 8 represent a hydrogen atom or a substituent; Z represents O, S, R 9 -N, (R 10 ) (R 11 )C, or (R 12 ) (R 13 )Si; and R 9 to R 13 each independently represent a hydrogen atom or a substituent.
摘要:
An organic light emitting device containing a compound represented by the following general formula in a light emitting layer have a high light emission efficiency. In the general formula (1), R 1 and R 2 represent carbazolyl, aryl, heteroaryl, alkyl or cycloalkyl; R 5 and R 6 represent alkyl; R 7 , R 8 and R 9 represent aryl, alkyl or carbazolyl; R 10 represents carbazolyl which may be substituted with carbazolyl, aryl, heteroaryl, alkyl or cycloalkyl; n1, n2, n6 and n7 represent an integer of from 0 to 4; n5 represents an integer of from 0 to 3; n8 and n9 represent an integer of from 0 to 5; and n10 represents 0 or 1.
摘要:
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 1 , Y 2 and Y 3 represent a triazine ring or a pyrimidine ring; Z 1 , Z 2 and R 1 to R 8 represent a hydrogen atom or a substituent; and at least one of R 1 to R 8 represents 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.