CROSS REFERENCE TO RELATED APPLICATIONS

This is the U.S. national phase application based on PCT Application No. PCT/KR2016/004610 filed, filed May 2, 2016, which is based on Korean Patent Application No. 10-2015-0091331, filed Jun. 26, 2015, the entire contents of all of which are hereby incorporated by reference.

TECHNICAL FIELD

A composition for an organic optoelectronic device, an organic optoelectronic device and a display device are disclosed.

BACKGROUND ART

An organic optoelectronic device is a device that converts electrical energy into photoenergy, and vice versa. An organic optoelectronic device may be classified as follows in accordance with its driving principles. One is an optoelectronic device where excitons are generated by photoenergy, separated into electrons and holes, and are transferred to different electrodes to generate electrical energy, and the other is a light emitting device where a voltage or a current is supplied to an electrode to generate photoenergy from electrical energy. Examples of the organic optoelectronic device may be an organic photoelectric device, an organic light emitting diode, an organic solar cell, and an organic photo conductor drum. Of these, an organic light emitting diode (OLED) has recently drawn attention due to an increase in demand for flat panel displays. The organic light emitting diode converts electrical energy into light by applying current to an organic light emitting material and has a structure in which an organic layer is interposed between an anode and a cathode. Efficiency of a light emitting diode is considered to be one of the critical factors for realizing a long life-span full color display. Accordingly, development of a high efficient organic light emitting diode using a phosphorescent material has been actively researched. In the present invention, in order to solve this problem, an organic light emitting diode using a high efficient phosphorescent material is provided.

DISCLOSURE

Technical Problem

An embodiment provides a composition for an organic optoelectronic device having high efficiency and long life-span characteristics.

Another embodiment provides an organic optoelectronic device including the composition for an organic optoelectronic device.

Yet another embodiment provides a display device including the organic optoelectronic device.

Technical Solution

According to an embodiment, a composition for an organic optoelectronic device includes at least one first compound represented by Chemical Formula 1, at least one second compound selected from a compound represented by Chemical Formula 2, and a compound consisting of a combination of a moiety represented by Chemical Formula 3 and a moiety represented by Chemical Formula 4, and at least one third compound represented by Chemical Formula 5.



In Chemical Formula 1,

Z is independently N, C, or CRa,

at least one of Z is N,

R1to R6and Raare independently hydrogen, deuterium, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, or a combination thereof,

R1to R6and Raare independently present or adjacent groups are linked to each other to form a ring,

L1and L2are independently a single bond, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C2 to C30 heteroarylene group, or a combination thereof,

n1 is 1,

n2 and n3 are independently an integer of 0 or 1, and

1≤n2+n3≤2;



wherein, in Chemical Formula 2,

L3to L6and Y1are independently, a single bond, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C2 to C30 heteroarylene group, or a combination thereof,

Ar1is a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof,

R7to R10are independently hydrogen, deuterium, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C50 aryl group, a substituted or unsubstituted C2 to C50 heterocyclic group, or a combination thereof, and

at least one of R7to R10and Ar1includes a substituted or unsubstituted triphenylene group or a substituted or unsubstituted carbazole group,



wherein, in Chemical Formulae 3 and 4,

Y2and Y3are independently a single bond, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C2 to C30 heteroarylene group, or a combination thereof,

Ar2and Ar3are independently substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof,

R11to R14are independently hydrogen, deuterium, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C50 aryl group, a substituted or unsubstituted C2 to C50 heterocyclic group, or a combination thereof,

two adjacent *'s of Chemical Formula 3 is combined with two *'s of Chemical Formula 4 to form a fused ring and in Chemical Formula 3, *'s not forming the fused ring are independently CRc, and

Rcis hydrogen, deuterium, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C6 to C12 aryl group, a substituted or unsubstituted C2 to C12 heterocyclic group, or a combination thereof;



wherein, in Chemical Formula 5,

X1to X12are independently N, C or CRd,

at least one of X1to X6is N,

at least one of X7to X12is N,

Rdis independently, hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkenyl group, a substituted or unsubstituted C1 to C30 alkynyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C6 to C30 aryloxy group, a substituted or unsubstituted C6 to C30 arylthio group, a substituted or unsubstituted C2 to C30 heterocyclic group, a hydroxyl group, thiol group, or a combination thereof,

Rdis independently present, or adjacent Rd's are linked to each other to form a ring,

L7is a single bond, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C2 to C30 heteroarylene group, or a combination thereof, and

the “substituted” refers to replacement of at least one hydrogen by deuterium, a halogen, a hydroxyl group, a C1 to C40 silyl group, a C1 to C30 alkyl group, a C3 to C30 cycloalkyl group, a C2 to C30 heterocycloalkyl group, a C6 to C30 aryl group, a C2 to C30 heterocyclic group, a C1 to C20 alkoxy group, a C1 to C10 trifluoroalkyl group, or a cyano group. According to another embodiment, an organic optoelectronic device including the composition for an organic optoelectronic device is provided. Yet according to another embodiment, a display device including the organic optoelectronic device is provided.

Advantageous Effects

An organic optoelectronic device having high efficiency and long life-span may be realized.

