CN-111233906-B - Organic electroluminescent device and polycyclic compound for organic electroluminescent device

CN111233906BCN 111233906 BCN111233906 BCN 111233906BCN-111233906-B

Abstract

An organic electroluminescent device and a polycyclic compound for the same are provided. The organic electroluminescent device includes a first electrode, a second electrode on the first electrode, and a plurality of organic layers between the first electrode and the second electrode, wherein a polycyclic compound represented by formula 1-1 or formula 1-2 is included in at least one of the plurality of organic layers. The polycyclic compound is represented by formula 1-1 or formula 1-2.

Inventors

Li Tingshe
ZHENG HUIREN
Pu Huizheng

Assignees

三星显示有限公司

Dates

Publication Date: 20260512
Application Date: 20191119
Priority Date: 20181129

Claims (5)

1. A polycyclic compound represented by formula A1 or formula A2: A1 A2 In the formulae A1 and A2, R 2 and R 3 are each independently a hydrogen atom, a deuterium atom or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, M and n are each independently integers from 0 to 4, X 1 is B, and the total number of the components is, X 2 is a group consisting of NR 1-2 , A is 1, and a is not shown, R 1-2 is a substituted or unsubstituted aryl group having from 6 to 15 ring-forming carbon atoms, Y 1 is a group consisting of NR 5 , R 5 is a substituted or unsubstituted aryl group having 6 to 15 ring-forming carbon atoms, and The substituents in the substituted alkyl and aryl groups are selected from the group consisting of deuterium atoms and alkyl groups having 1 to 6 carbon atoms.
2. The polycyclic compound according to claim 1, wherein R 5 is unsubstituted phenyl.
3. A polycyclic compound, wherein the polycyclic compound is represented by any one of the compounds represented in compound group 1: Compound group 1 。
4. An organic electroluminescent device, the organic electroluminescent device comprising: A first electrode; A second electrode on the first electrode, and A plurality of organic layers between the first electrode and the second electrode, Wherein each of the first and second electrodes independently comprises at least one selected from Ag, mg, cu, al, pt, pd, au, ni, nd, ir, cr, li, ca, liF/Ca, liF/Al, mo, ti, a compound selected from Ag, mg, cu, al, pt, pd, au, ni, nd, ir, cr, li, ca, liF/Ca, liF/Al, mo, ti, a mixture selected from Ag, mg, cu, al, pt, pd, au, ni, nd, ir, cr, li, ca, liF/Ca, liF/Al, mo, ti, and a transparent metal oxide, and Wherein at least one of the organic layers comprises the polycyclic compound according to any one of claims 1 to 3.
5. The organic electroluminescent device according to claim 4, the organic layers respectively comprising: a hole transport region on the first electrode; An emissive layer on the hole transport region, and An electron transport region on the emissive layer, Wherein the emissive layer comprises a host and a dopant, an The dopant includes the polycyclic compound.

Description

Organic electroluminescent device and polycyclic compound for organic electroluminescent device The present application claims priority and rights of korean patent application No. 10-2018-0151038, filed on 11/29 of 2018, the entire contents of which are incorporated herein by reference. Technical Field Embodiments of the present disclosure relate to an organic electroluminescent device and a polycyclic compound for an organic electroluminescent device. Background Organic electroluminescent display devices are being actively developed as image display devices. Unlike a liquid crystal display device, an organic electroluminescent display device is a so-called self-luminous display device in which holes and electrons injected from a first electrode and a second electrode, respectively, are recombined in an emission layer, and a light-emitting material which is an organic compound included in the emission layer emits light to realize display. Examples of the organic electroluminescent device (e.g., an organic device) may include a first electrode, a hole transport layer on the first electrode, an emission layer on the hole transport layer, an electron transport layer on the emission layer, and a second electrode on the electron transport layer. Holes are injected from the first electrode, the injected holes move through the hole transport layer and are injected into the emissive layer. On the other hand, electrons are injected from the second electrode, and the injected electrons move through the electron transport layer and are injected into the emission layer. Holes and electrons injected into the emission layer are recombined, thereby generating excitons in the emission layer. The organic electroluminescent device emits light by using light generated when excitons fall back (e.g., transition or relaxation) to a ground state. In applying the organic electroluminescent device to a display apparatus, the organic electroluminescent device having a low driving voltage, high luminous efficiency and long life has been beneficial, and thus, development of a material for the organic electroluminescent device capable of stably achieving the requirements has been studied. Disclosure of Invention Embodiments of the present disclosure provide an organic electroluminescent device and a polycyclic compound for the organic electroluminescent device. Embodiments of the present disclosure provide an organic electroluminescent device including a first electrode, a second electrode on the first electrode, and a plurality of organic layers between the first electrode and the second electrode, wherein each of the first electrode and the second electrode independently includes at least one selected from the group consisting of Ag, mg, cu, al, pt, pd, au, ni, nd, ir, cr, li, ca, liF/Ca, liF/Al, mo, ti, a compound selected from the group consisting of Ag, mg, cu, al, pt, pd, au, ni, nd, ir, cr, li, ca, liF/Ca, liF/Al, mo, ti, a mixture selected from the group consisting of Ag, mg, cu, al, pt, pd, au, ni, nd, ir, cr, li, ca, liF/Ca, liF/Al, mo, ti, and a transparent metal oxide, wherein at least one of the organic layers may include a polycyclic compound represented by formula 1-1 or formula 1-2: 1-1 1-2 In formula 1-1, R 1 to R 3 may each independently be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or may be bonded to an adjacent group to form a condensed polycyclic ring, and l to n may each independently be an integer of 0 to 4. X 1 can be B or N, X 2 can be BR 1-1 or NR 1-2,R1-1 and R 1-2 can each independently be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms. Subscript a may be 1 or 2, y 1 may be O, S, BR 4 or NR 5, and R 4 and R 5 may each independently be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having from 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having from 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having from 2 to 30 ring-forming carbon atoms, or may be bonded to adjacent groups to form a condensed polycyclic ring. At least one of R 1 to R 5 may be bound to an adjacent group to form a condensed polycyclic ring having a B-N direct bond, or may be a heteroaryl having a B-N direct bond. In formula 1-2, X 3 and X 4 may each independently be B or N, Y 2 to Y 4 may each independently be BR 6、NR7, O or S, and R 6 and R 7 may each independently be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, or a subst