Samsung Display Co., Ltd.

University-Industry Cooperation Group of Kyung Hee University

Miehwa Park

Taekyung Kim

Jaeyong Lee

Minkyung Kim

Youngkook Kim

Seokhwan Hwang

Jungsub Lee

Sanghyun Han

Hyein Jeong

Hyejin Jung

Sooyon Kim

Kwanghyun Kim

Daeyup Shin

JangHyuk Kwon

Siwoo Kim

Jisu Moon

Juyoung Lee

Daehyun Ahn

An organic light-emitting device and a heterocyclic compound, the device including a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode and including an emission layer, wherein the organic layer includes a heterocyclic compound represented by Formula 1: 

Heterocyclic compound and organic light-emitting device including the same

An organic light-emitting device is provided, including: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode and comprising an emission layer, wherein the emission layer includes a host and a dopant, wherein the host includes at least one selected from a phosphine oxide-based compound, a pyrimidine-containing compound, a triazine-containing compound, and a cyano group-containing compound, and the dopant satisfies Equation 1, wherein, in Equation 1, Erefers to a singlet state energy level (eV) of the dopant; and Erefers to a triplet state energy level (eV) of the dopant:||&#x2264;0.2 eV.&#x2003;&#x2003;Equation 1

Organic light-emitting device

An organic light-emitting device including a first electrode; a second electrode facing the first 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 a first compound represented by Formula 1 and a second compound represented by Formula 2: 

An organic light-emitting device includes: a first electrode; a second electrode facing the first 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 a first compound and a second compound. The organic light-emitting device may have a high efficiency and long lifespan.

An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer between the first electrode and the second electrode and including an emission layer, wherein the organic layer includes a first compound and a second compound; the first compound is represented by one selected from Formulae 1-1 to 1-4, and does not include a nitrogen-containing heterocyclic group that includes *&#x2550;N&#x2014;*' as a ring-forming moiety, and the second compound is represented by Formula 2: 

An organic light-emitting device includes a first electrode; a second electrode facing the first electrode; and an organic emission layer between the first electrode and the second electrode. The organic emission layer may include a compound represented by Formula 1: wherein Formula 1 contains an indenoindenyl moiety. The compound may increase hole mobility in the device when used as a hole transport and/or hole injection material, thereby improving its lifetime, current, voltage, and luminescent characteristics.

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Yongin-si, South Korea

Miehwa Park