Abstract:
An OLED material may reduce the driving voltage of an OLED and/or increase the device lifetime compared to conventional OLED materials, specifically an aromatic amine, N(Ara)(Arb)(Arc), wherein Ara is of formula (II) La being a single bond or arylene, R1 to R4 being alkyl, aryl, etc., R3 and R4 optionally being bonded to form a ring, o being 0 to 3, and p being 0 to 4, wherein Arb is of formula (III) and Arc is aryl or of formula (III) X is NRa, O, or S, and Ra and R5 to R7 being alkyl, aryl, etc., R5's, R6's, or R7's adjacent to each other, or R5 and R6 optionally being bonded to form a ring, n being 2 to 4 when X is NRa, and 0 to 4 when X is O or S, q is 0 to 3, r and s are independently 0 to 4.
Abstract:
An organic electroluminescence device comprising: a cathode; an anode; and an organic layer disposed between the cathode and the anode, wherein the organic layer includes an emitting layer and a first layer; the first layer is disposed between the cathode and the emitting layer; the emitting layer contains a compound represented by the following formula (A1); and the first layer contains a compound represented by the following formula (B1).
Abstract:
An organic electroluminescence device comprising: cathode; anode; and organic layer disposed between cathode and anode, wherein organic layer comprises a emitting layer and a first layer, the first layer being disposed between anode and emitting layer, and immediately adjoining emitting layer, emitting layer comprising a compound represented by formula (A1) and the first layer comprising a compound represented by formula (B1) or formula (C1) below.
Abstract:
An aromatic amine derivative represented by formula (1): wherein R1, R2, R3, L, Ar1, Ar2, k, m, and n are the same as defined in the specification, is useful as a material for an organic EL device and realizes an organic EL device with a high efficiency and a long lifetime even when driving it at a low voltage.
Abstract:
A compound is represented by a formula (2) below, where a ring A represents a substituted or unsubstituted aromatic heterocycle, a ring B represents a substituted or unsubstituted aromatic heterocycle or a substituted or unsubstituted aromatic hydrocarbon ring, and a ring C represents a substituted or unsubstituted aromatic heterocycle having 7 to 50 ring atoms or a substituted or unsubstituted aromatic hydrocarbon ring having 7 to 50 ring carbon atoms.
Abstract:
A nitrogen-containing aromatic heterocyclic derivative in which a nitrogen atom of an indenocarbazole skeleton optionally having a hetero atom or an indenoindole skeleton optionally having a hetero atom is bonded to a dibenzofuran or a dibenzothiophene directly or indirectly. The derivative realizes an organic EL device with a high emission efficiency and a long lifetime.
Abstract:
Provided are an organic EL device material that reduce the driving voltage of an organic EL device and increase the lifetime of the device as compared with a conventional organic EL device material. Also provided are organic electroluminescence devices containing the organic EL device material.
Abstract:
Provided are an organic electroluminescence device that not only provides high efficiency but also has a long lifetime, and an aromatic amine derivative that realizes the device. The organic electroluminescence device includes an aromatic amine derivative, including at least one substituent A having dibenzofuran and at least one substituent B selected from groups each having dibenzofuran or carbazole, in a molecule thereof, in which the substituent A and the substituent B include groups different from each other, and the substituent A and the substituent B are bonded to the same nitrogen atom, or different nitrogen atoms, in the molecule. The molecules of the aromatic amine derivative hardly crystallize, which improves a yield in the production of the organic electroluminescence device. In the organic electroluminescence device, including an organic thin film layer formed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode, the aromatic amine derivative is contained in at least one layer, particularly a hole transport layer, in the organic thin film layer.
Abstract:
Problem to Be Solved:To provide a highly efficient, long lifetime organic EL device that is capable of driving at low voltage.SolutionAn organic electroluminescence device including an organic layer which includes a hole transporting layer and a light emitting layer between an anode and a cathode in this order from the anode side, in which the organic layer includes an acceptor material and the hole transporting layer includes a compound represented by formula (1): wherein each of L1 and L2 is independently represented by formula (1-2) or (1-3) and each of Ar1 to Ar5 is independently represented by any one of formulae (1-4) to (1-9): wherein: each of R1 to R17 independently represents a substituted or unsubstituted alkyl group, a halogen atom, a substituted or unsubstituted fluoroalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted fluoroalkoxy group, or a cyano group; each of n1 to n5, n7, n9, n15, and n17 independently represents an integer of 0 to 4; each of n6, n8, n10, n11, and n13 independently represents an integer of 0 to 5; each of n12, n14 and n16 independently represents an integer of 0 to 3; R6 to R17 may be bonded to each other to form a ring; and each of wavy lines indicates a bonding site.
Abstract:
A compound represented by formula (1) provides a high performance organic electroluminescence device and a novel material for realizing such an organic electroluminescence device:
wherein R1 to R6, a to f, L1 to L3, and Ar are as defined in the description.