Condensed cyclic compounds and organic light-emitting devices including the same

1. A condensed cyclic compound represented by Formula 1 below:

in Formula 1,

L 1 to L 4 are each independently selected from a substituted or unsubstituted C 3 -C 10 cycloalkylene group, a substituted or unsubstituted C 3 -C 10 heterocycloalkylene group, a substituted or unsubstituted C 3 -C 10 cycloalkenylene group, a substituted or unsubstituted C 3 -C 10 heterocycloalkenylene group, a substituted or unsubstituted C 6 -C 60 arylene group, a substituted or unsubstituted C 2 -C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic hetero-condensed polycyclic group;

a1 is selected from 1, 2, and 3;

a2 to a4 are each independently selected from 0, 1, 2, and 3;

R 1 is selected from a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 3 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 3 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 2 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group, —P(═O)(Q 1 )(Q 2 ), and —S(═O) 2 (Q 1 );

R 2 to R 4 are each independently selected from hydrogen, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 3 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 3 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 2 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group, —P(═O)(Q 1 )(Q 2 ), and —S(═O) 2 (Q 1 );

R 5 to R 7 are each independently selected from hydrogen, 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 substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl 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 2 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 2 -C 10 heterocycloalkenyl 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 6 -C 60 arylthio group, a substituted or unsubstituted C 2 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group;

b5 to b7 are each independently selected from 1, 2, 3, and 4;

at least one substituent of the substituted C 3 -C 10 cycloalkylene group, the substituted C 2 -C 10 heterocycloalkylene group, the substituted C 3 -C 10 cycloalkenylene group, the substituted C 2 -C 10 heterocycloalkenylene group, the substituted C 6 -C 60 arylene group, the substituted C 2 -C 60 heteroarylene group, the substituted divalent non-aromatic condensed polycyclic group, the substituted divalent non-aromatic hetero-condensed polycyclic group, the substituted C 1 -C 60 alkyl group, the substituted C 2 -C 60 alkenyl group, the substituted C 2 -C 60 alkynyl group, the substituted C 1 -C 60 alkoxy group, the substituted C 3 -C 10 cycloalkyl group, the substituted C 2 -C 10 heterocycloalkyl group, the substituted C 3 -C 10 cycloalkenyl group, the substituted C 2 -C 10 heterocycloalkenyl group, the substituted C 6 -C 60 aryl group, the substituted C 6 -C 60 aryloxy group, the substituted C 6 -C 60 arylthio group, the substituted C 2 -C 60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, and the substituted monovalent non-aromatic condensed hetero-polycyclic group are selected from:

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, carboxylic acid group or a salt thereof, sulfonic acid group or a salt thereof, 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 selected from 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, carboxylic acid group or a salt thereof, sulfonic acid group or a salt thereof, phosphoric acid group or a salt thereof, a C 3 -C 10 cycloalkyl group, a C 2 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -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 2 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group;

a C 3 -C 10 cycloalkyl group, a C 2 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -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 2 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group;

a C 3 -C 10 cycloalkyl group, a C 2 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -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 2 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group and a monovalent non-aromatic condensed hetero-polycyclic group, each substituted with at least one selected from 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, carboxylic acid group or a salt thereof, sulfonic acid group or a salt thereof, 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 2 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 2 -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 2 -C 60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group; and

—P(═O)(Q 11 )(Q 12 ) and —S(═O) 2 (Q 11 ); wherein,

Q 1 , Q 2 , Q 11 , and Q 12 are each independently selected from a C 6 -C 60 aryl group and a C 2 -C 60 heteroaryl group.

2. The condensed cyclic compound as claimed in claim 1 , wherein L 1 to L 4 are each independently groups selected from:

phenylene, pentalenylene, indenylene, naphthylene, azulenylene, heptalenylene, indacenylene, acenaphthylene, fluorenylene, spiro-fluorenylene, benzofluorenylene, dibenzofluorenylene, phenalenylene, phenanthrenylene, anthracenylene, fluoranthenylene, triphenylenylene, pyrenylene, chrysenylene, naphthacenylene, picenylene, perylenylene, pentaphenylene, hexacenylene, pentacenylene, rubicenylene, coronenylene, ovalenylene, pyrrolylene, thiophenylene, furanylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isooxazolylene, pyridinylene, pyrazinylene, pyrimidinylene, pyridazinylene, isoindolylene, indolylene, indazolylene, purinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, carbazolylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzoimidazolylene, benzofuranylene, benzothiophenylene, isobenzothiazolylene, benzooxazolylene, isobenzooxazolylene, triazolylene, tetrazolylene, oxadiazolylene, triazinylene, dibenzofuranylene, dibenzothiophenylene, benzocarbazolylene, and dibenzocarbazolylene; and

phenylene, pentalenylene, indenylene, naphthylene, azulenylene, heptalenylene, indacenylene, acenaphthylene, fluorenylene, spiro-fluorenylene, benzofluorenylene, dibenzofluorenylene, phenalenylene, phenanthrenylene, anthracenylene, fluoranthenylene, triphenylenylene, pyrenylene, chrysenylene, naphthacenylene, picenylene, perylenylene, pentaphenylene, hexacenylene, pentacenylene, rubicenylene, coronenylene, ovalenylene, pyrrolylene, thiophenylene, furanylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isooxazolylene, pyridinylene, pyrazinylene, pyrimidinylene, pyridazinylene, isoindolylene, indolylene, indazolylene, purinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, carbazolylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzoimidazolylene, benzofuranylene, benzothiophenylene, isobenzothiazolylene, benzooxazolylene, isobenzooxazolylene, triazolylene, tetrazolylene, oxadiazolylene, triazinylene, dibenzofuranylene, dibenzothiophenylene, benzocarbazolylene and dibenzocarbazolylene, each substituted with at least one group selected from 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, carboxylic acid group or a salt thereof, sulfonic acid group or a salt thereof, phosphoric acid group or a salt thereof, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, carbazolyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, thiadiazolyl, and imidazopyridinyl.

3. The condensed cyclic compound as claimed in claim 1 , wherein L 1 to L 4 are each independently selected from groups represented by Formulae 3-1 to 3-30 below:

in Formulae 3-1 to 3-30,

Y 1 is O, S, a C(Z 3 )(Z 4 ), N(Z 5 ), or Si(Z 6 )(Z 7 );

Z 1 to Z 7 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl 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,

d1 is an integer of 1 to 4;

d2 is an integer of 1 to 3;

d3 is an integer of 1 to 6;

d4 is an integer of 1 to 8;

d5 is an integer of 1 or 2;

d6 is an integer of 1 to 5; and

* and *′ are binding sites to neighboring atoms.

4. The condensed cyclic compound as claimed in claim 1 , wherein L 1 to L 4 are each independently selected from groups represented by Formulae 4-1 to 4-21 below:

in Formulae 4-1 to 4-21, * and *′ are binding sites to neighboring atoms.

5. The condensed cyclic compound as claimed in claim 1 , wherein R 1 is a group selected from: phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, a dibenzosilolyl group, benzocarbazolyl, dibenzocarbazolyl, benzoxanthenyl, —P(═O)(Q 1 )(Q 2 ), and —S(═O) 2 (Q 1 ), in which Q 1 and Q 2 are each independently a C 6 -C 60 aryl group; and

phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, a dibenzosilolyl group, benzocarbazolyl, dibenzocarbazolyl and benzoxanthenyl, each substituted with at least one group selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 20 alkyl, a C 1 -C 20 alkoxy, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, and dibenzocarbazolyl; and

R 2 to R 4 are each independently groups selected from:

hydrogen, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, a dibenzosilolyl group, benzocarbazolyl, dibenzocarbazolyl, benzoxanthenyl, —P(═O)(Q 1 )(Q 2 ), and —S(═O) 2 (Q 1 ), in which Q 1 and Q 2 are each independently a C 6 -C 60 aryl group; and

phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, a dibenzosilolyl group, benzocarbazolyl, dibenzocarbazolyl and benzoxanthenyl, each substituted with at least one group selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 20 alkyl, a C 1 -C 20 alkoxy, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, and dibenzocarbazolyl.

6. The condensed cyclic compound as claimed in claim 1 , wherein R 1 is a group selected from:

phenyl, naphthyl, fluorenyl, phenanthrenyl, anthracenyl, triphenylenyl, pyrenyl, chrysenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl quinolinyl, isoquinolinyl, carbazolyl, phenanthrolinyl, benzoimidazolyl, triazinyl, benzoxanthenyl, —P(═O)(Q 1 )(Q 2 ), and —S(═O) 2 (Q 1 ), in which Q 1 and Q 2 are each independently selected from a phenyl group and a naphthyl group; and

phenyl, naphthyl, fluorenyl, phenanthrenyl, anthracenyl, triphenylenyl, pyrenyl, chrysenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl quinolinyl, isoquinolinyl, carbazolyl, phenanthrolinyl, benzoimidazolyl, triazinyl and benzoxanthenyl, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, methyl, ethyl, n-propyl, tert-butyl, methoxy, ethoxy, tert-butoxy, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, and dibenzocarbazolyl; and

R 2 to R 4 are each independently groups selected from:

hydrogen, phenyl, naphthyl, fluorenyl, phenanthrenyl, anthracenyl, triphenylenyl, pyrenyl, chrysenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl quinolinyl, isoquinolinyl, carbazolyl, phenanthrolinyl, benzoimidazolyl, triazinyl, benzoxanthenyl, —P(═O)(Q 1 )(Q 2 ), and —S(═O) 2 (Q 1 ), in which Q 1 and Q 2 are each independently selected from a phenyl group and a naphthyl group; and

phenyl, naphthyl, fluorenyl, phenanthrenyl, anthracenyl, triphenylenyl, pyrenyl, chrysenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl quinolinyl, isoquinolinyl, carbazolyl, phenanthrolinyl, benzoimidazolyl, triazinyl and benzoxanthenyl, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, methyl, ethyl, n-propyl, tert-butyl, methoxy, ethoxy, tert-butoxy, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, and dibenzocarbazolyl.

7. The condensed cyclic compound as claimed in claim 1 , wherein R 1 is a group selected from —P(═O)(Ph) 2 , —S(═O) 2 (Ph) and a group represented by any one of Formulae 5-1 to 5-44; and R 2 to R 4 are each independently selected from hydrogen, —P(═O)(Ph) 2 , —S(═O) 2 (Ph) and a group represented by any one of Formulae 5-1 to 5-44:

in Formulae 5-1 to 5-44, * is a binding site to a neighboring atom.

8. The condensed cyclic compound as claimed in claim 1 , wherein R 5 to R 7 are each independently groups selected from:

hydrogen, 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, carboxylic acid group or a salt thereof, sulfonic acid group or a salt thereof, phosphoric acid group or a salt thereof, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, a dibenzosilolyl group, benzocarbazolyl, dibenzocarbazolyl, and benzoxanthenyl; and

phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, a dibenzosilolyl group, benzocarbazolyl, dibenzocarbazolyl and benzoxanthenyl, each substituted with at least one group selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, and dibenzocarbazolyl.

9. The condensed cyclic compound as claimed in claim 1 , wherein R 5 to R 7 are each independently groups selected from:

hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, methyl, ethyl, n-propyl, tert-butyl, methoxy, ethoxy, phenyl, naphthyl, fluorenyl, phenanthrenyl, anthracenyl, triphenylenyl, pyrenyl, chrysenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl quinolinyl, isoquinolinyl, carbazolyl, phenanthrolinyl, benzoimidazolyl, triazinyl, and benzoxanthenyl; and

phenyl, naphthyl, fluorenyl, phenanthrenyl, anthracenyl, triphenylenyl, pyrenyl, chrysenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl quinolinyl, isoquinolinyl, carbazolyl, phenanthrolinyl, benzoimidazolyl, triazinyl and benzoxanthenyl, each substituted with at least one group selected from deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, methyl, ethyl, n-propyl, tert-butyl, methoxy, ethoxy, tert-butoxy, phenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthyl, fluorenyl, spiro-fluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, picenyl, perylenyl, pentaphenyl, hexacenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, pyrrolyl, thiophenyl, furanyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isooxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, carbazolyl, benzoquinolinyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzoimidazolyl, benzofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, and dibenzocarbazolyl.

10. The condensed cyclic compound as claimed in claim 1 , wherein R 5 to R 7 are each independently selected from hydrogen, deuterium, a cyano group, a nitro group and a group represented by any one of Formulae 5-1 to 5-44:

in Formulae 5-1 to 5-44, * is a binding site to a neighboring atom.

11. 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 organic layer includes the condensed cyclic compound as claimed in claim 1 .

12. The organic light-emitting device as claimed in claim 11 , wherein the organic layer further includes an electron transport region between the emission layer and the second electrode, the electron transport region including the condensed cyclic compound.

13. The organic light-emitting device as claimed in claim 12 , wherein the electron transport region includes an electron transport layer, the electron transport layer including the condensed cyclic compound.