IP Library › Granted Patent US 9,818,950

Granted Patent B2

US 9,818,950 · App. 14/630,247 · Granted Nov 14, 2017

Organic light-emitting devices

Inventors: Naoyuki Ito (Yongin, KR); Seulong Kim (Yongin, KR); Younsun Kim (Yongin, KR); Dongwoo Shin (Yongin, KR); Jungsub Lee (Yongin, KR)

Assignee: SAMSUNG DISPLAY CO., LTD.

H01L51/0058 H01L51/0052 H01L51/0067 H01L51/0072 H01L51/0073 H01L51/5024 H01L2251/5384

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Quick Facts

Patent No.: US 9,818,950
App. No.: 14/630,247
Granted: Nov 14, 2017
Kind: B2

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Abstract

An organic light-emitting device including a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer, wherein the emission layer includes a first host represented by Formula 1 and a second host represented by one of Formulae 2-1 to 2-3:

Claims (92)

1. An organic light-emitting device, comprising:

a first electrode;

a second electrode; and

an organic layer between the first electrode and the second electrode, the organic layer including an emission layer,

wherein the emission layer includes a first host represented by Formula 1 and a second host represented by one of Formulae 2-1 to 2-3:

wherein, in the above Formulae,

A 21 and A 22 are each independently a group represented by one of Formulae 2A-1 and 2A-2;

B 21 , B 22 , and B 23 are each independently selected from substituted or unsubstituted C 6 -C 60 arene;

X 21 is selected from N-[(L 22 ) a22 -(R 22 ) b22 ], an oxygen atom (O), a sulfur atom (S), and C(R 24 )(R 25 );

L 11 and L 21 to L 23 are each independently selected from a substituted or unsubstituted C 6 -C 60 arylene group and a substituted or unsubstituted C 1 -C 60 heteroarylene group;

a11 and a21 to a23 are each independently selected from 0, 1, 2, and 3;

R 11 , R 21 , and R 22 are each independently selected from a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, provided that R 11 does not include a carbazolyl group;

b11, b21, and b22 are each independently selected from 1, 2, and 3;

R 12 to R 14 and R 23 to R 25 are each independently selected from a hydrogen, a deuterium, —F, —C 1 , —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 substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q 1 )(Q 2 )(Q 3 );

b12 to b14 are each independently selected from 1, 2, 3, and 4;

b23 is selected from 1 and 2;

n21 is selected from 0, 1, 2, and 3;

at least one substituent of the substituted C 6 -C 60 arene, the substituted C 6 -C 60 arylene group, the substituted C 1 -C 60 heteroarylene group, the substituted C 1 -C 60 alkyl group, the substituted C 1 -C 60 alkoxy group, the substituted C 3 -C 10 cycloalkyl group, the substituted C 6 -C 60 aryl group, the substituted C 6 -C 60 aryloxy group, the substituted C 1 -C 60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, and the substituted monovalent non-aromatic condensed heteropolycyclic group is selected from:

a 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 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group,

a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group, each substituted with at least one of a 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 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q 11 )(Q 12 )(Q 13 ),

a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one of a 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 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 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q 21 )(Q 22 )(Q 23 ), and

—Si(Q 31 )(Q 32 )(Q 33 ),

wherein Q 1 to Q 3 , Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 are each independently selected from a C 1 -C 60 alkyl group, a C 6 -C 60 aryl group, a C 1 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.

2. The organic light-emitting device as claimed in claim 1 , wherein B 21 , B 22 , and B 23 are each independently selected from:

a benzene, a naphthalene, a phenanthrene, an anthracene, and a triphenylene; and

a benzene, a naphthalene, a phenanthrene, an anthracene, and a triphenylene, each substituted with at least one of a 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, and a C 6 -C 60 aryl group.

3. The organic light-emitting device as claimed in claim 1 , wherein L 11 and L 21 to L 23 are each independently selected from:

a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an indolylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a benzofuranylene group, a benzothiophenylene group, a triazolylene group, a tetrazolylene group, a triazinylene group, a dibenzofuranylene group, and a dibenzothiophenylene group, each substituted with at least one of a 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 cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, and an imidazopyridinyl group.

4. The organic light-emitting device as claimed in claim 1 , wherein L 11 and L 21 to L 23 are each independently a group represented by one of Formulae 3-1 to 3-10:

wherein, in Formulae 3-1 to 3-10,

R 31 is selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C 1 -C 20 alkyl group, a phenyl group, and a naphthyl group;

b31 is selected from 1, 2, 3, and 4;

b32 is selected from 1, 2, 3, 4, 5, and 6;

b33 is selected from 1, 2, and 3; and

* and *′ are binding sites with adjacent atoms.

5. The organic light-emitting device as claimed in claim 1 , wherein L 11 , and L 21 to L 23 are each independently a group represented by one of Formulae 4-1 to 4-6:

wherein, in Formulae 4-1 to 4-6, * and *′ are binding sites with adjacent atoms.

6. The organic light-emitting device as claimed in claim 1 , wherein R 21 and R 22 are each independently selected from:

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzothiazolyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one of a 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 pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzothiazolyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, and

wherein R 11 is selected from:

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzothiazolyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, and a dibenzosilolyl group, each substituted with a 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 C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a benzothiazolyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, or a dibenzothiophenyl group.

7. The organic light-emitting device as claimed in claim 1 , wherein R 11 is selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group,a thiophenyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, and a dibenzosilolyl group, each substituted with at least one of a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C 1 -C 20 alkyl group, a phenyl group, and a naphthyl group.

8. The organic light-emitting device as claimed in claim 1 , wherein R 11 is a group represented by one of Formulae 5-1 to 5-7:

wherein, in Formulae 5-1 to 5-7,

X 51 is selected from O, S, and C(R 53 )(R 54 );

R 51 to R 54 are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C 1 -C 20 alkyl group, a phenyl group, and a naphthyl group;

b51 is selected from 1, 2, 3, 4, and 5;

b52 is selected from 1, 2, 3, 4, 5, 6, and 7;

b53 is selected from 1, 2, and 3;

b54 is selected from 1, 2, 3, and 4; and

* indicates a binding site with an adjacent atom.

9. The organic light-emitting device as claimed in claim 1 , wherein R 11 is a group represented by one of Formulae 6-1 to 6-13:

wherein, in Formulae 6-1 to 6-13, * indicates a binding sited with an adjacent atom.

10. The organic light-emitting device as claimed in claim 1 , wherein R 21 and R 22 are each independently selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a pyridyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, and a benzimidazolyl group, and

a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a pyridyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, and a benzimidazolyl group, each substituted with at least one of a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C 1 -C 20 alkyl group, a phenyl group, and a naphthyl group.

11. The organic light-emitting device as claimed in claim 1 , wherein R 21 and R 22 are each independently a group represented by one of Formulae 5-1 to 5-32:

wherein, in Formulae 5-1 to 5-32,

X 51 is selected from O, S, and C(R 53 )(R 54 );

R 51 to R 54 are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C 1 -C 20 alkyl group, a phenyl group, and a naphthyl group;

b51 is selected from 1, 2, 3, 4, and 5;

b52 is selected from 1, 2, 3, 4, 5, 6, and 7;

b53 is selected from 1, 2, and 3;

b54 is selected from 1, 2, 3, and 4;

b55 is selected from 1, 2, 3, 4, 5, and 6; and

* indicates a binding sited with an adjacent atom.

12. The organic light-emitting device as claimed in claim 1 , wherein R 21 and R 22 are each independently a group represented by one of Formulae 7-1 to 7-107:

wherein, in Formulae 7-1 to 7-107,

Ph is a phenyl group; and

* indicates a binding site with an adjacent atom.

13. The organic light-emitting device as claimed in claim 1 , wherein R 12 to R 14 and R 23 to R 28 are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, a sec-butyl group, an iso-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, an n-octyl group, a phenyl group, a naphthyl group, and —Si(CH 3 ) 3 .

14. The organic light-emitting device as claimed in claim 1 , wherein n21 is 0.

15. The organic light-emitting device as claimed in claim 1 , wherein:

the first host is represented by one of Formulae 1-1 and 1-2, and

the second host is represented by one of Formulae 2-11 to 2-13:

wherein, in Formulae 1-1, 1-2, and 2-11 to 2-13, R 11 to R 14 , b11 to b14, A 21 , A 22 , B 21 to B 23 , L 21 , a21, R 21 , and b21 are the same as those defined with respect to Formula 1 and Formulae 2-1 to 2-3.

16. The organic light-emitting device as claimed in claim 1 , wherein:

the first host is represented by one of Formulae 1-11 and 1-12, and

the second host is represented by one of Formulae 2-21 to 2-26:

wherein, in Formulae 1-11 and 1-12 and Formulae 2-21 to 2-26, R 11 , R 13 , X 21 , L 21 , a21, and R 21 are the same as those defined with respect to Formula 1 and Formulae 2-1 to 2-3.

17. The organic light-emitting device as claimed in claim 1 , wherein:

the first host is selected from Compounds H-1a to H-9a, and

the second host is selected from Compounds H-1b to H-8b:

18. The organic light-emitting device as claimed in claim 1 , wherein the first host and the second host are included in the emission layer in a volume ratio of about 94:3 to about 77:20.

19. The organic light-emitting device as claimed in claim 1 , wherein the emission layer further includes a fluorescent dopant.

20. The organic light-emitting device as claimed in claim 19 , wherein the emission layer emits light having a wavelength of about 400 nm to about 530 nm.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 24, 2015

From: ITO, NAOYUKI; KIM, SEULONG; KIM, YOUNSUN; SHIN, DONGWOO; LEE, JUNGSUB

To: SAMSUNG DISPLAY CO., LTD.

Reel/Frame 035020/0022 →

Priority Claims (1)

KR 10-2014-0127681 · Sep 24, 2014 · national

Continuity (1)

Related Publication 20160118590A1 · Apr 28, 2016