Abstract:
Provided are an organic electroluminescence device having high current efficiency and a long lifetime, and a biscarbazole derivative for realizing the device. The biscarbazole derivative has a specific substituent. The organic EL device has a plurality of organic thin-film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin-film layers contains the biscarbazole derivative.
Abstract:
Provided are an organic EL device material capable of reducing the driving voltage of an organic EL device and increasing the lifetime of the device as compared with a conventional organic EL device material, specifically an aromatic amine derivative represented by N(Ara)(Arb)(Arc), and an organic EL device using the material. [Ara is represented by the formula (II). (In the formula (II): La represents a single bond or an arylene group; R1 to R4 each represent an alkyl group, an aryl group, or the like, and R3's or R4's, or R3 and R4 may be bonded to each other to form a ring; and o represents 0 to 3 and p represents 0 to 4.) Arb is represented by the formula (III). (in the formula (III), X represents NRa, O, or S, and Ra and R5 to R7 each represent an alkyl group, an aryl group, or the like, and R5's, R6's, or R7's adjacent to each other, or R5 and R6 may be bonded to each other to form a ring; n represents 2 to 4 when X represents NRa, and represents 0 to 4 when X represents O or S; and q represents 0 to 3, r and s each independently represent 0 to 4.) Arc represents an aryl group, or is represented by the formula (III).]
Abstract:
An object of the invention is to provide an organic EL device which operates at a reduced driving voltage and has a prolonged lifetime. The aromatic amine derivative of the invention is represented by formula (1): wherein Ar1 and Ar2 each represent an aryl group or a heteroaryl group; L1 and L2 each represent a single bond, an arylene group or a heteroarylene group; R1 to R4 each represent an alkyl group, an aryl group, a heteroaryl group, an alkoxy group, an aralkyl group, an aryloxy group, an arylthio group, an alkoxycarbonyl group, a halogen atom, a cyano group, a nitro group, a silyl group, a hydroxyl group, or a carboxyl group; a and b each represent an integer of 0 to 4; and R5 to R12 each represent a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group or a silyl group; provided that at least one selected from R5 and R7 is not a hydrogen atom, wherein when R5 is not a hydrogen atom, R6 is not a hydrogen atom, and when R7 is not a hydrogen atom, R8 is not a hydrogen atom.
Abstract translation:本发明的目的是提供一种以降低的驱动电压工作并具有延长使用寿命的有机EL器件。 本发明的芳族胺衍生物由式(1)表示:其中Ar1和Ar2各自表示芳基或杂芳基; L1和L2各自表示单键,亚芳基或亚杂芳基; R 1〜R 4各自表示烷基,芳基,杂芳基,烷氧基,芳烷基,芳氧基,芳硫基,烷氧基羰基,卤素原子,氰基,硝基, 甲硅烷基,羟基或羧基; a和b各自表示0〜4的整数; R 5〜R 12各自表示氢原子,烷基,芳基,杂芳基或甲硅烷基; 条件是选自R5和R7中的至少一个不是氢原子,其中当R5不是氢原子时,R6不是氢原子,当R7不是氢原子时,R8不是氢原子。
Abstract:
An organic electroluminescence device having a long lifetime and a higher emission efficiency and a specific aromatic amine derivative which provides such an organic electroluminescence device are provided. In the specific aromatic amine derivative, a dibenzofuranyl group or a dibenzothiophenyl group is bonded via a p-phenylene and a heteroaryl group is bonded via a m-phenylene. The organic electroluminescence device includes a cathode, an anode and an organic thin film layer including one or more layers which is disposed between the cathode and the anode. The organic thin film layer includes at least one light emitting layer and at least one layer of the organic thin film layer includes the aromatic amine derivative singly or in combination.
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.