Organic light emitting device and display device having the same

Patent metadata

Field	Value
Publication number	US-9876180-B2
Application number	US-201615207529-A
Country	US
Kind code	B2
Filing date	Jul 12, 2016
Priority date	Dec 3, 2015
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

An organic light emitting device and a display device including the same, the organic light emitting device including a first electrode; a hole controlling layer on the first electrode; an emission layer on the hole controlling layer; an electron controlling layer on the emission layer; and a second electrode on the electron controlling layer, wherein the emission layer includes a hole transport host material, an electron transport host material, a bipolar host material, and at least one dopant material.

First claim

What is claimed is:

1. An organic light emitting device, comprising:
a first electrode;
a hole controlling layer disposed on the first electrode;
an emission layer disposed on the hole controlling layer;
an electron controlling layer disposed on the emission layer; and
a second electrode disposed on the electron controlling layer,
wherein the emission layer includes a hole transport host compound, an electron transport host compound, a bipolar host compound, and at least one dopant material, and
wherein the hole transport host compound, the electron transport host compound, and the bipolar host compound are different from one another.

2. The organic light emitting device as claimed in claim 1 , wherein the bipolar host compound is a compound represented by the following Formula 1:

wherein, in Formula 1,
X and Y are each independently one of NR, S, O or Si,
R is a substituted or unsubstituted aryl group having 6 to 40 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 40 ring carbon atoms,
L 1 and L 2 are each independently selected from hydrogen, deuterium, a halogen atom, an amino group, a nitro group, a nitrile group, an alkyl group having 1 to 40 carbon atoms, an alkenyl group having 2 to 40 carbon atoms, an alkynyl group having 2 to 40 carbon atoms, an aryl group having 5 to 40 ring carbon atoms, a heteroaryl group having 1 to 40 ring carbon atoms, an alkoxy group having 1 to 40 carbon atoms, an aryloxy group having 5 to 40 carbon atoms, an alkylamino group having 1 to 40 carbon atoms, an arylamino group having 5 to 40 carbon atoms, a diarylamino group having 5 to 40 carbon atoms, a heteroarylamino group having 5 to 40 carbon atoms, a diheteroarylamino group having 2 to 40 carbon atoms, an arylakyl group having 6 to 40 carbon atoms, a heteroarylalkyl group having 6 to 40 carbon atoms, a cycloalkyl group having 3 to 40 carbon atoms, a halogenalkyl group having 1 to 40 carbon atoms, a heterocycloalkyl group having 3 to 40 carbon atoms, an alkylsilyl group having 3 to 40 carbon atoms, an arylsilyl group having 3 to 40 carbon atoms, and a heteroarylsilyl group having 3 to 40 carbon atoms,
Ar 1 and Ar 2 are each independently selected from a substituted or unsubstituted aryl group having 5 to 60 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 60 ring carbon atoms, and a substituted or unsubstituted condensed polycyclic group having 6 to 60 ring carbon atoms, and
n1, n2, m1, and m2 are each independently 0 or 1.

3. The organic light emitting device as claimed in claim 2 , wherein the bipolar host compound represented by Formula 1 is represented by the following Formula 2:

wherein, in Formula 2,
R 1 to R 3 are each independently a substituted or unsubstituted aryl group having 6 to 40 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 40 ring carbon atoms, and
a1 is 0 or 1.

4. The organic light emitting device as claimed in claim 3 , wherein:
at least one of R 1 to R 3 is the substituted or unsubstituted heteroaryl group having 5 to 40 ring carbon atoms, and
the substituted or unsubstituted heteroaryl group having 5 to 40 ring carbon atoms includes a heteroatom selected from N, S, or O.

5. The organic light emitting device as claimed in claim 3 , wherein R 1 to R 3 are each independently one of the following groups:

6. The organic light emitting device as claimed in claim 2 , wherein the bipolar host compound represented by Formula 1 is one of the following Compounds H-1 to H-9:

7. The organic light emitting device as claimed in claim 2 , wherein the bipolar host compound represented by Formula 1 is represented by the following Formula 5:

wherein, in Formula 5,
a2 is 0 or 1, and
R 4 to R 6 are each independently a substituted or unsubstituted aryl group having 6 to 40 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 40 ring carbon atoms, the substituted groups being substituted with one of the following substituents:

8. The organic light emitting device as claimed in claim 2 , wherein the bipolar host compound represented by Formula 1 is one of the following Compounds E-1 to E-12:

9. The organic light emitting device as claimed in claim 1 , wherein the hole transport host compound is a compound represented by the following Formula 8:

wherein, in Formula 8,
L 11 is a direct linkage, a substituted or unsubstituted arylene group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 15 ring carbon atoms,
R 11 and R 12 are each independently hydrogen, a halogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 40 carbon atoms, a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 50 ring carbon atoms.

10. The organic light emitting device as claimed in claim 9 , wherein the hole transport host compound represented by Formula 8 is one of the following Compounds A-1 to A-16:

11. The organic light emitting device as claimed in claim 1 , wherein the electron transport host compound is a compound represented by the following Formula 10:

wherein, in Formula 10,
L 31 to L 33 are each independently selected from a substituted or unsubstituted cycloalkylene group having 3 to 10 carbon atoms, a substituted or unsubstituted heterocycloalkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkenylene group having 3 to 10 carbon atoms, a substituted or unsubstituted heterocycloalkenylene group having 1 to 10 carbon atoms, a substituted or unsubstituted arylene group

Assignees

• Samsung Display Co Ltd

Inventors

• Jeong Hyein
• Lee Jungsub

Classifications

• H01L51/0054

  Electricity · mapped topic

• H01L51/0058

  Electricity · mapped topic

• C07D241/42

  with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring · CPC title

• H01L51/0071

  Electricity · mapped topic

• C07D241/38

  with only hydrogen or carbon atoms directly attached to the ring nitrogen atoms · CPC title