Organic light-emitting device

Patent metadata

Field	Value
Publication number	US-11737299-B2
Application number	US-202217649548-A
Country	US
Kind code	B2
Filing date	Jan 31, 2022
Priority date	Oct 28, 2015
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

An organic light-emitting device including: a first electrode; a second electrode facing the first electrode; a first emission unit and a second emission unit between the first electrode and the second electrode; and a first charge generation layer between the first emission unit and the second emission unit; wherein the first emission unit includes a first emission layer and a first inorganic buffer layer, and the second emission unit includes a second emission layer and a second inorganic buffer layer.

First claim

What is claimed is:

1. An organic light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode; and
a first emission unit and a second emission unit between the first electrode and the second electrode; and
a first charge generation layer between the first emission unit and the second emission unit;
wherein the first emission unit comprises a first emission layer,
the second emission unit comprises a second emission layer, and
at least one selected from the group consisting of the first emission unit and the second emission unit comprises a first metal halide and a second metal.

2. The organic light-emitting device of claim 1 , wherein a first metal of the first metal halide is different from the second metal.

3. The organic light-emitting device of claim 1 , wherein a first metal of the first metal halide is identical to the second metal.

4. The organic light-emitting device of claim 1 , wherein the first metal halide comprises at least one halide compound selected from the group consisting of an alkali metal halide, an alkaline earth metal halide, a transition metal halide, a post-transition metal halide, and a lanthanum-based metal halide.

5. The organic light-emitting device of claim 1 , wherein the first metal halide comprises at least one iodide compound selected from the group consisting of an alkali metal iodide, an alkaline earth metal iodide, a transition metal iodide, a post-transition metal iodide, and a lanthanum-based metal iodide.

6. The organic light-emitting device of claim 1 , wherein the first metal halide comprises at least one iodide compound selected from the group consisting of a lithium (Li) iodide, a sodium (Na) iodide, a potassium (K) iodide, a rubidium (Rb) iodide, a cesium (Cs) iodide, a beryllium (Be) iodide, a magnesium (Mg) iodide, a calcium (Ca) iodide, a strontium (Sr) iodide, a barium (Ba) iodide, a ytterbium (Yb) iodide, a samarium (Sm) iodide, a copper (Cu) iodide, a thallium (Tl) iodide, a silver (Ag) iodide, a cadmium (Cd) iodide, a mercury (Hg) iodide, a tin (Sn) iodide, a lead (Pb) iodide, a bismuth (Bi) iodide, a zinc (Zn) iodide, a manganese (Mn) iodide, an iron (Fe) iodide, a cobalt (Co) iodide, a nickel (Ni) iodide, an aluminum (Al) iodide, an indium (in) iodide, a gallium (Ga) iodide, a thorium (Th) iodide, and a uranium (U) iodide.

7. The organic light-emitting device of claim 1 , wherein the first metal halide comprises at least one iodide compound selected from the group consisting of LiI, NaI, KI, RbI, CsI, BeI 2 , MgI 2 , CaI 2 , SrI 2 , BaI 2 , YbI, YbI 2 , YbI 3 , SmI 3 , CuI, TlI, AgI, CdI 2 , HgI 2 , SnI 2 , PbI 2 , BiI 3 , ZnI 2 , MnI 2 , FeI 2 , CoI 2 , NiI 2 , AlI 3 , InI 3 , GaI 3 , ThI 4 , and UI 3 .

8. The organic light-emitting device of claim 1 , wherein the second metal comprises at least one metal selected from the group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Yb, Sm, Cu, Tl, Ag, Cd, Hg, Sn, Pb, Bi, Zn, Mn, Fe, Co, Ni, Al, In, Ga, Th, and U.

9. The organic light-emitting device of claim 1 , wherein the first emission unit further comprises an organic layer, and the organic layer comprises the first metal halide and the second metal.

10. The organic light-emitting device of claim 1 , wherein the second emission unit further comprises an organic layer, and the organic layer comprises the first metal halide and the second metal.

11. The organic light-emitting device of claim 1 , wherein the first charge generation layer comprises an n-charge generation layer and a p-charge generation layer,
wherein the n-charge generation layer comprises an n-type dopant, and the p-charge generation layer comprises a p-type dopant.

12. The organic light-emitting device of claim 1 , wherein:
the first emission unit further comprises a first hole transport region between the first emission layer and the first electrode, and a first electron transport region between the first emission layer and the first charge generation layer, and
the second emission unit further comprises a second hole transport region between the second emission layer and the first charge generation layer, and a second electron transport region between the second emission layer and the second electrode.

13. The organic light-emitting device of claim 12 , wherein the first hole transport region and the second hole transport region each independently comprise at least one selected from the group consisting of m-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline/dodecylbenzenesulfonic acid (PANI/DBSA), poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), polyaniline/camphor sulfonic acid (PANI/CSA), polyaniline/poly(4-styrenesulfonate) (PANI/PSS), a compound represented by Formula 201, and a compound represented by Formula 202:

wherein, in Formulae 201 and 202,
L 201 to L 205 are each independently selected from the group consisting of:
a phenylene group, a naphthylene group, a fluorenylene group, a spiro-bifluorenylene group, a benzofluorene group, a dibenzofluorene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, an isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group; and
a phenylene group, a naphthylene group, a fluorenylene group, a spiro-bifluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, an isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group, each substituted with at least one selected from the group consisting of deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group,
xa1 to xa4 are each independently selected from 0, 1, 2, and 3,
xa5 is selected from 1, 2, 3, 4, and 5, and
R 201 to R 204 are each independently selected from the group consisting of:
a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
a phenyl group, a bipheny

Assignees

• Samsung Display Co Ltd

Inventors

• Seo Dongkyu
• Kim Dongchan
• Kim Wonjong
• Kim Eungdo
• Lee Jihye
• Im Dahea
• Yim Sanghoon
• Cho Yoonhyeung
• Han Wonsuk

Classifications

• H10K50/181

  Electron blocking layers · CPC title

• H10K50/16

  Electron transporting layers · CPC title

• H10K50/17

  Carrier injection layers · CPC title

• H10K85/624

  containing six or more rings · CPC title

• H10K50/805

  Electrodes · CPC title