Samsung Electronics Co., Ltd.

Samsung Display Co., Ltd.

Seoul National University

Seongjin Jeong

Hyein Jeong

Sehun Kim

Seokhan Park

Samil Kho

Youngwoong Son

Hyoungkun Kim

Bowon Yoo

Yejee Sunwoo

Jongin Hong

A semiconductor device includes; cell transistors on a substrate, lower electrodes respectively connected to the cell transistors, arranged according to a first pitch in a first horizontal direction, and extending in a vertical direction, and an etching stop layer surrounding lower sidewalls of the lower electrodes and arranged at a level higher than a level of the cell transistors, wherein the etching stop layer includes a first portion vertically overlapping the lower electrodes and a second portion laterally surrounding the first portion, and the second portion includes recesses arranged according to a second pitch in the first horizontal direction.

Semiconductor device and manufacturing method

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

Growing community of inventors

Seoul, South Korea

Seongjin Jeong