Organic light-emitting device and electronic apparatus including the same

Patent metadata

Field	Value
Publication number	US-11600795-B2
Application number	US-202016788628-A
Country	US
Kind code	B2
Filing date	Feb 12, 2020
Priority date	Feb 15, 2019
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

An organic light-emitting device and an electronic apparatus incorporating the same. The organic light-emitting device includes an anode, a cathode, and an organic layer between the anode and the cathode and comprising an emission region. The emission region includes a first emission layer, a second emission layer, and a first exciton quenching layer. The first emission layer comprises a first host and a first dopant, the second emission layer comprises a second host and a second dopant, and the first exciton quenching layer is disposed between the first emission layer and the second emission layer and comprises a first quenching material.

First claim

What is claimed is:

1. An organic light-emitting device comprising:
an anode;
a cathode; and
an organic layer between the anode and the cathode and comprising an emission region,
wherein:
the emission region comprises a first emission layer, a second emission layer, and a first exciton quenching layer;
the first emission layer comprises a first host and a first dopant;
the second emission layer comprises a second host and a second dopant;
the first exciton quenching layer is disposed between the first emission layer and the second emission layer and comprises a first quenching material; and
the first quenching material comprises at least one selected from a fluorescence emitting material and a phosphorescence emitting material.

2. The organic light-emitting device of claim 1 , wherein
the first host, the first dopant, the second host, the second dopant, and the first quenching material satisfy Equations 1-1 to 1-4:
T1(Q1)≤T1(H1)  <Equation 1-1>

T1(Q1)≤T1(D1)  <Equation 1-2>

T1(Q1)≤T1(H2)  <Equation 1-3>

T1(Q1)≤T1(D2)  <Equation 1-4>,

wherein, in Equations 1-1 to 1-4,
T1(Q1) is a lowest excitation triplet energy level of the first quenching material,
T1(H1) is a lowest excitation triplet energy level of the first host,
T1(D1) is a lowest excitation triplet energy level of the first dopant,
T1(H2) is a lowest excitation triplet energy level of the second host, and
T1(D2) is a lowest excitation triplet energy level of the second dopant.

3. The organic light-emitting device of claim 1 , wherein
the lowest excitation triplet energy level T1(Q1) of the first quenching material is in a range of about 1 eV to about 3.5 eV.

4. The organic light-emitting device of claim 1 , wherein
the first quenching material comprises the fluorescence emitting material, and
the fluorescence emitting material is selected from Compounds MH1 to MH13 and LH1 to LH11:

5. The organic light-emitting device of claim 1 , wherein
the first quenching material comprises a fluorescence emitting material, and
the fluorescence emitting material comprises at least one selected from a diamine-based compound, a styryl-based compound, a perylene-based compound, and a coumarin-based compound.

6. The organic light-emitting device of claim 1 , wherein
the first quenching material comprises a phosphorescence emitting material, and
the phosphorescence emitting material is selected from Compounds H101 to H119:

7. The organic light-emitting device of claim 1 , wherein
the first quenching material comprises a phosphorescence emitting material, and
the phosphorescence emitting material is used for red or green light emission.

8. The organic light-emitting device of claim 1 , wherein
an amount of the first quenching material is in a range of about 0.05 parts by weight to about 20 parts by weight based on 100 parts by weight of the first exciton quenching layer.

9. The organic light-emitting device of claim 1 , wherein,
with respect to a length of 100 length % from an interface between the first exciton quenching layer and the first emission layer to an interface between the first exciton quenching layer and the second emission layer,
about 70 parts by weight or more among 100 parts by weight of the first quenching material is included in (i) a region (M 0,20 ) in which a length from the interface between the first exciton quenching layer and the first emission layer is in a range of about 0 length % to about 20 length % and (ii) a region (M 80,100 ) in which a length from the interface between the first exciton quenching layer and the first emission layer is in a range of about 80 length % to about 100 length %.

10. The organic light-emitting device of claim 1 , wherein,
with respect to a length of 100 length % from an interface between the first exciton quenching layer and the first emission layer to an interface between the first exciton quenching layer and the second emission layer,
about 70 parts by weight or more among 100 parts by weight of the first quenching material is included in (i) a region (M 0,50 ) in which a length from the interface between the first exciton quenching layer and the first emission layer is in a range of about 0 length % to about 50 length % or (ii) a region (M 50,100 ) in which a length from the interface between the first exciton quenching layer and the first emission layer is in a range of about 50 length % to about 100 length %.

11. An organic light-emitting device comprising:
an anode;
a cathode; and
an organic layer between the anode and the cathode and comprising an emission region,
wherein:
the emission region comprises a first emission layer, a second emission layer, and a first exciton quenching layer;
the first emission layer comprises a first host and a first dopant;
the second emission layer comprises a second host and a second dopant;
the first exciton quenching layer is disposed between the first emission layer and the second emission layer and comprises a first quenching material; and
the first exciton quenching layer further comprises a third host, or a third host and a third dopant.

12. The organic light-emitting device of claim 11 , wherein
at least one of the first host and the second host is the same as the third host.

13. The organic light-emitting device of claim 1 , wherein
the first host comprises a first hole transport host comprising no electron transport moiety and a first electron transport host comprising at least one electron transport moiety, and
the second host comprises a second hole transport host comprising no electron transport moiety and a second electron transport host comprising at least one electron transport moiety.

14. The organic light-emitting device of claim 13 , wherein
the first hole transport host and the second hole transport host are each independently a compound represented by one selected from Formulae 301-1 to 301-6, and
the first electron transport host and the second electron transport host are each independently a compound represented by one selected from Formulae 301-7 to 301-9:

wherein, in Formulae 301-1 to 301-9,
A 301 to A 304 are each independently selected from a benzene group, a naphthalene group, a phenanthrene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a pyridine group, a pyrimidine group, an indene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, an indole group, a carbazole group, a benzocarbazole group, a dibenzocarbazole group, a furan group, a benzofuran group, a dibenzofuran group, a naphthofuran gr

Assignees

• Samsung Display Co Ltd

Inventors

• Ko Heejoo

Classifications

• H10K2101/10

  Triplet emission · CPC title

• H10K85/622

  containing four rings, e.g. pyrene · CPC title

• H10K85/6565

  Oxadiazole compounds · CPC title

• H10K85/324

  comprising aluminium, e.g. Alq3 · CPC title

• C09K2211/1059

  containing three nitrogen atoms as heteroatoms · CPC title