Light-emitting device and electronic apparatus including the same

Patent metadata

Field	Value
Publication number	US-2024008361-A1
Application number	US-202318306364-A
Country	US
Kind code	A1
Filing date	Apr 25, 2023
Priority date	Jun 29, 2022
Publication date	Jan 4, 2024
Grant date	—

Abstract

A light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode, wherein the interlayer includes an emission layer, a hole transport layer, and an electron transport layer. The emission layer includes an electron transport host compound and a dopant. A hole mobility of the hole transport layer is greater than 1×10−4 cm2/Vs, an electron mobility of the electron transport layer is greater than 1×10−5 cm2/Vs, and an electron mobility of the electron transport host compound is less than 1×10−8 cm2/Vs.

First claim

What is claimed is:

1 . A light-emitting device comprising:
a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode, wherein the interlayer includes:
an emission layer;
a hole transport layer; and
an electron transport layer,
the emission layer includes an electron transport host compound and a dopant, a hole mobility of the hole transport layer is greater than 1×10 −4 cm 2 /Vs, an electron mobility of the electron transport layer is greater than 1×10 −5 cm 2 /Vs, and an electron mobility of the electron transport host compound is less than 1×10 −8 cm 2 /Vs.

2 . The light-emitting device of claim 1 , wherein
the first electrode is an anode, the second electrode is a cathode, the interlayer further includes a hole transport region between the first electrode and the emission layer, and the hole transport region includes a hole injection layer, an electron blocking layer, or a combination thereof.

3 . The light-emitting device of claim 1 , wherein
the interlayer further includes a hole injection layer, and the hole injection layer includes a p-dopant.

4 . The light-emitting device of claim 1 , wherein
the first electrode is an anode, the second electrode is a cathode, the interlayer further includes an electron transport region between the second electrode and the emission layer, and the electron transport region includes an electron injection layer, a hole blocking layer, or a combination thereof.

5 . The light-emitting device of claim 1 , wherein the electron transport layer includes a metal-containing material.

6 . The light-emitting device of claim 5 , wherein the metal-containing material includes an alkali metal complex, an alkaline earth-metal complex, or a combination thereof.

7 . The light-emitting device of claim 1 , wherein the dopant is a phosphorescent dopant.

8 . The light-emitting device of claim 1 , wherein an amount of the dopant in the emission layer is in a range of about 1% to about 50%, as a volume ratio.

9 . The light-emitting device of claim 1 , wherein the electron transport host compound includes a silicon (Si) moiety, a triazine moiety, a pyrimidine moiety, a pyridine moiety, a phenanthroline moiety, a triazole moiety, or a combination thereof.

10 . The light-emitting device of claim 1 , wherein the electron transport host compound is represented by Formula 1:

wherein in Formulae 1 and 1-1,
X 1 to X 3 are each independently CH or N,
at least one of X 1 to X 3 is each N,
R 10 to R 12 are each independently a group represented by Formula 1-1, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkenyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkynyl group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 alkoxy group unsubstituted or substituted with at least one R 10a , a C 3 -C 10 cycloalkyl group unsubstituted or substituted with at least one R 10a , a C 1 -C 10 heterocycloalkyl group unsubstituted or substituted with at least one R 10a , a C 3 -C 10 cycloalkenyl group unsubstituted or substituted with at least one R 10a , a C 1 -C 10 heterocycloalkenyl group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 aryl group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 aryloxy group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 arylthio group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 heteroaryl group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 heteroaryloxy group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 heteroarylthio group unsubstituted or substituted with at least one R 10a , a monovalent non-aromatic condensed polycyclic group unsubstituted or substituted with at least one R 10a , a monovalent non-aromatic condensed heteropolycyclic group unsubstituted or substituted with at least one R 10a , —B(Q 1 )(Q 2 ), —N(Q 1 )(Q 2 ), —P(Q 1 )(Q 2 ), —C(═O)(Q 1 ), —S(═O)(Q 1 ), —S(═O) 2 (Q 1 ), —P(═O)(Q 1 )(Q 2 ), or —P(═S)(Q 1 )(Q 2 ),
one of R 10 to R 12 is a group represented by Formula 1-1,
R′ 1 to R′ 3 are each independently a branched C 3 -C 8 alkyl group unsubstituted or substituted with at least one R 10a , a C 3 -C 10 cycloalkyl group unsubstituted or substituted with at least one R 10a , or a C 6 -C 16 aryl group unsubstituted or substituted with at least one R 10a ,
L is a C 1 -C 20 alkylene group unsubstituted or substituted with at least one R 10a , a C 1 -C 20 alkenylene group unsubstituted or substituted with at least one R 10a , a C 1 -C 20 alkynylene group unsubstituted or substituted with at least one R 10a , a C 3 -C 10 cycloalkylene group unsubstituted or substituted with at least one R 10a , a C 1 -C 10 heterocycloalkylene group unsubstituted or substituted with at least one R 10a , a C 3 -C 10 cycloalkenylene group unsubstituted or substituted with at least one R 10a , a C 1 -C 10 heterocycloalkenylene group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 arylene group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 heteroarylene group unsubstituted or substituted with at least one R 10a , a divalent non-aromatic condensed polycyclic group unsubstituted or substituted with at least one R 10a , or a divalent non-aromatic condensed heteropolycyclic group unsubstituted or substituted with at least one R 10a ,
l is an integer from 0 to 3,
* indicates a binding site to a neighboring atom,
R 10a is:
deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group;
a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, or a C 1 -C 60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 7 -C 60 arylalkyl group, a C 2 -C 60 heteroarylalkyl group, —N(Q 11 )(Q 12 ), —B(Q 11 )(Q 12 ), —C(═O)(Q 11 ), —S(═O) 2 (Q 11 ), —P(═O)(Q 11 )(Q 12 ), or a combination thereof;
a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 7 -C 60 arylalkyl group, or a C 2 -C 60 heteroarylalkyl group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxy group, a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 7 -C 60 arylalkyl group, a C 2 -C 60 heteroarylalkyl group, —N(Q 21 )(Q 22 ), —B(Q 21 )(Q 22 ), —C(═O)(Q 21 ), —S(═O) 2 (Q 21 ), —P(═O)(Q 21 )(Q 22 ), or a combination thereof; or
—N(Q 31 )(Q 32 ), —B(Q 31 )(Q 32 ), —C(═O)(Q 31 ), —S(═O) 2 (Q 31 ), or —P(═O)(Q 31 )(Q 32 ),
wherein Q 1 to Q 3 , Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 32 are each independently: hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro group; a C 1 -C 60 alkyl group; a C 2 -C 60 alkenyl group; a C 2 -C 60 alkynyl group; a C 1 -C 60 alkoxy group; or a C 3 -C

Assignees

• Samsung Display Co Ltd

Inventors

• Ko Heejoo
• Kang Sunwoo
• Jeon Pyungeun
• Chu Changwoong

Classifications

• C09K11/06

  containing organic luminescent materials · CPC title

• H10K85/636 Primary

  comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom · CPC title

• H10K85/6572

  comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole · CPC title

• H10K85/40

  Organosilicon compounds, e.g. TIPS pentacene · CPC title

• H10K85/346

  comprising platinum · CPC title