Samsung Display Co., Ltd.

Seoul National University

Merck Patent Gmbh

Samil Kho

Sunyoung Lee

Philipp Stoessel

Seunggak Yang

Youngkook Kim

Seokhwan Hwang

Holger Heil

Arne Buesing

Jin-O Lim

Yoonhyun Kwak

Kwanhee Lee

Frank Voges

Hyein Jeong

Constanze Brocke

Hyoungkun Kim

Junyoung Lee

Haejin Kim

Sehun Kim

Donghoon Kim

Mikyung Kim

Sanghoon Yim

Donghwan Kim

Seongjin Jeong

Jinwoong Kim

Eunkyoung Kim

Jongin Hong

Kwanghyung Kim

An organic light-emitting includes a first electrode having a work function greater than about 4.9 eV and less than about 5.2 eV, a second electrode facing the first electrode, an organic layer disposed between the first electrode and the second electrode and including an emission layer, a hole transport region disposed between the first electrode and the emission layer, wherein the hole transport region includes a first hole transport layer including a first hole-transporting material, and the first hole transport layer is substantially free of a p-dopant.

Organic light-emitting device and method of manufacturing the same

An organic electroluminescence device includes a first electrode, a hole transport region disposed on the first electrode, a first emission layer disposed on the hole transport region and including a first light-emitting host and a first light-emitting dopant, a second emission layer disposed on the first emission layer and including a first electron transport material and a second light-emitting dopant, an electron transport region disposed on the second emission layer and including a second electron transport material, and a second electrode disposed on the electron transport region, wherein a triplet energy of the first light-emitting host (T1), a triplet energy of the second light-emitting dopant (T1) and a triplet energy of the second electron transport material (T1) satisfy a relation of T1&#x3c;T1&#x3c;T1. High emission efficiency may be shown.

Organic electroluminescence device

An organic light-emitting display apparatus includes a first sub-pixel, a second sub-pixel, and a third sub-pixel configured to emit different colors of light. The organic light-emitting display apparatus includes: a substrate; first through third pixel electrodes; a first organic emission layer configured to emit light having a first wavelength; a second organic emission layer configured to emit light having a second wavelength; a third organic emission layer configured to emit light having a third wavelength; an opposite electrode; a capping layer over the opposite electrode and having a refractive index with respect to the first wavelength that is higher than a refractive index with respect to the second wavelength by at least 7%; and a thin-film encapsulation layer over the capping layer.

Organic light-emitting display apparatus

An organic light-emitting device having high efficiency and long lifespan 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 represented by Formula 1 and a second compound represented by Formula 2: When compounds represented by Formulae 1 and 2 are included in the emission layer, organic light-emitting devices may exhibit improved driving voltage, improved luminance, improved efficiency, and/or improved lifespans.

Organic light emitting device

A condensed cyclic compound and an organic light-emitting device, the compound being represented by Formula 1 below: 

Condensed cyclic compound and organic light-emitting device including the same

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Yongin-si, South Korea

Samil Kho