摘要:
An organic light-emitting device containing a host material, a delayed fluorescent material and a light-emitting material satisfying E S1 (H)>E S1 (F)>E S1 (D) has a high light emission efficiency. E S1 (H) represents a lowest excited singlet energy level of the host material, E S1 (F) represents a lowest excited singlet energy level of the delayed fluorescent material, and E S1 (D) represents a lowest excited singlet energy level of the light-emitting material.
摘要:
The present invention relates to an electron transport material comprising a compound of a certain structure, and an organic electroluminescent device comprising the same. The organic electroluminescent device comprising the electron transport material of the present invention has a low driving voltage, high luminous efficiency and good color purity, and thus effectively shows blue emission.
摘要:
A metal complex having a structural formula as follows, wherein, the metal atom M is selected from the group consisting of iridium (Ir), platinum (Pt), osmium (Os), rhenium (Re), ruthenium (Ru) and copper (Cu); R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of -F, -CF 3 , -CH 3 and substituted phenyl; in the (C^N) substructure located on a left side of the metal atom M in the structural formula (I), C is located in a first aromatic or heteroaromatic ring, and N is located in a second heteroaromatic ring. The metal complex can be used in luminescent material of display devices.
摘要:
The present invention discloses a thermally activated and sensitized phosphorescence organic electroluminescence device, comprising a luminescent layer, wherein a host material of the luminescent layer consists of two materials, wherein one of the two materials is a hole transport material, the other is an electron transport material, at least one of the two materials is a thermally activated delayed fluorescence material; and the host material is doped by a phosphorescent dye, and a proportion of the phosphorescent dye in the luminescent layer is
摘要:
Provided is an aromatic amine derivative represented by the formula N(Ar A ) (Ar B ) (Ar C ) as an organic EL device material capable of reducing the driving voltage of an organic EL device, and improving its luminous efficiency and device lifetime. Ar A represents the formula (II-1) or (II-2). L a represents an arylene group or the like, Ar a represents an aryl group or the like, and n represents 2 or 3. Ar B represents the formula (III). L b represents a single bond or the like, R 1 and R 2 each represent an alkyl group or the like, o and p each represent 0 to 3 or the like, X represents an oxygen atom or the like, and R 3 , R 4 and R 5 each represent an alkyl group or the like. Ar c represents an aryl group, a heteroaryl group, or the formula (II-1), (II-2), or (III).
摘要:
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and of simple constitution. Also disclosed is a compound useful for the fabrication of said organic EL device. The organic electroluminescent device comprises organic layers including a light-emitting layer disposed between an anode and a cathode which are piled one upon another on a substrate and said organic layers comprise a compound represented by general formula (1). A light-emitting layer containing a phosphorescent dopant is suitable for an organic layer comprising a compound represented by general formula (1). In general formula (1), X is CR or N; Ar 1 to Ar 3 each is a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted aromatic heterocyclic group; Ar 2 , Ar 3 and the nitrogen to which Ar 2 and Ar 3 are joined may together form a nitrogen-containing heterocyclic ring; m and n each is an integer of 1 or 2 and the sum of m and n is 3.
摘要:
A polycyclic compound according to an embodiment of the inventive concept is represented by the following Formula 1:
In Formula 1, Ar 1 and Ar 2 are each independently substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, where Ar 1 and Ar 2 may combine with each other to form a ring, and A is represented by the following Formula 2-1 or 2-2:
摘要:
Charged organic thermally activated delayed fluorescence (TADF) species are described. A light-emitting electrochemical cell (LEEC) includes the charged organic thermally activated delayed fluorescence (TADF) species and sufficient counter ions to balance the charge on the charged organic thermally activated delayed fluorescence species, as emitter material. Also disclosed are OLEDSs containing the TADF species.