Abstract: A condensed cyclic compound represented by Formula 1: wherein, in Formula 1, rings, groups and variables are the same as defined in the specification.

Abstract: A thin film including a combination of a donor compound and an acceptor compound, and a phosphorescent dopant, wherein the donor compound and the acceptor compound form an exciplex having characteristics described in the specification.

Abstract: An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an emission layer disposed between the first electrode and the second electrode, wherein the emission layer includes a first material not including an electron transport moiety, a second material including at least one electron transport moiety, a third material having reorganization energy of about 0.4 eV or more, and a light-emitting material, wherein the first material, the second material, the third material, and the light-emitting material are different from one another, and wherein a ratio of a light-emitting component emitted from the light-emitting material to a total of light-emitting components emitted from the emission layer is about 90% or more.

Abstract: A composition including a donor compound and an acceptor compound, wherein the donor compound and the acceptor compound form an exciplex having characteristics described in the specification.

Abstract: An organic light-emitting device includes a first electrode layer; a hole injection layer on the first electrode layer; a hole transport layer on the hole injection layer; an electron blocking layer on the hole transport layer, and including a plurality of layers; a light-emitting layer on the electron blocking layer; an electron transport layer on the light-emitting layer; an electron injection layer on the electron transport layer; and a second electrode layer on the electron transport layer, wherein the electron blocking layer has a highest occupied molecular orbital value which is lower than a highest occupied molecular orbital value of the hole transport layer, and the light-emitting layer has a HOMO value which is lower than a highest occupied molecular orbital value of the electron blocking layer.

Abstract: An organometallic compound represented by Formula 1: M(L1)n1(L2)n2??Formula 1 wherein in Formula 1, M, L1, L2, n1, and n2 are defined in the detailed description.

Abstract: A thin film including a combination of a donor compound and an acceptor compound, and a phosphorescent dopant, wherein the donor compound and the acceptor compound form an exciplex having characteristics described in the specification.

Abstract: A composition including a first compound represented by Formula 1 and a second compound represented by Formula 2: Ar1-(L1)a1-Ar2??Formula 1 Ar11-(L11)a11-Ar12??Formula 2 wherein Ar1, Ar2, Ar11, Ar12, L1, L11, a1, and a11 are the same as described in the specification.

Abstract: An organometallic compound represented by Formula 1, wherein the organometallic compound has a horizontal orientation ratio of a transition dipole moment in a range of about 85 percent to about 100 percent: M(L1)n??Formula 1 wherein, in Formula 1, M is selected from a first-row transition metal of the Periodic Table of Elements, a second-row transition metal of the Periodic Table of Elements, and a third-row transition metal of the Periodic Table of Elements, n is 2 or 3, L1 is a bidentate organic ligand bound to M, wherein L1 does not comprise a fluoro group (—F), and wherein L1 groups in the number of n are identical to each other.

Abstract: A condensed cyclic compound represented by Formulae 1A or 1B: wherein in Formulae 1A and 1B, groups and variables are the same as described in the specification.

Abstract: A condensed-cyclic compound represented by Formula 1: wherein, in Formula 1, Ar11, X1 to X8, and Z11 to Z14 are the same as described in the specification.

Abstract: An organometallic compound represented by Formula 1: wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: A condensed cyclic compound represented by Formula 1: wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, wherein the emission layer includes a host and a dopant, and wherein the organic light-emitting device satisfies predetermined conditions described in the specification.

Abstract: An organic light-emitting device includes a first electrode layer; a hole injection layer on the first electrode layer; a hole transport layer on the hole injection layer; an electron blocking layer on the hole transport layer, and including a plurality of layers; a light-emitting layer on the electron blocking layer; an electron transport layer on the light-emitting layer; an electron injection layer on the electron transport layer; and a second electrode layer on the electron transport layer, wherein the electron blocking layer has a highest occupied molecular orbital value which is lower than a highest occupied molecular orbital value of the hole transport layer, and the light-emitting layer has a HOMO value which is lower than a highest occupied molecular orbital value of the electron blocking layer.

Abstract: A condensed cyclic compound represented by Formula 1: wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer has an emission layer, wherein the emission layer includes a host and a thermally activated delayed fluorescent dopant, wherein the dopant includes a condensed cyclic compound represented by Formula 1, and wherein an amount of the dopant is smaller than that of the host: Ar1—Ar2??Formula 1 wherein Ar1 and Ar2 are the same as described in the specification.

Abstract: A condensed cyclic compound represented by Formula 1: wherein in Formula 1, a1, a2, Ar1, Ar2, R1, and R2 are the same as described in the specification.

Abstract: A composition including a first compound represented by Formula 1 and a second compound represented by Formula 2: Ar1-(L1)a1-Ar2??Formula 1 Ar11-(L11)a11-Ar12??Formula 2 wherein Ar1, Ar2, Ar11, Ar12, L1, L11, a1, and a11 are the same as described in the specification.

Abstract: A composition including a donor compound and an acceptor compound, wherein the donor compound and the acceptor compound form an exciplex having characteristics described in the specification.