Samsung Electronics Co., Ltd.

Samsung Display Co., Ltd.

Naotoshi Suganuma

Dae Young Chung

Ha Il Kwon

Fumiaki Kato

Soonmin Cha

Takahiro Fujiyama

Masashi Tsuji

Tae Ho Kim

Norihito Ishii

Yusaku Konishi

Eun Joo Jang

Kyung Bae Park

Hyo Sook Jang

Chul Joon Heo

Tomoyuki Kikuchi

Sung Jun Park

Sung Young Yun

Hiroaki Itoi

Ichinori Takada

Mitsunori Ito

Masatsugu Ueno

Katsunori Shibata

Hiroko Endo

Keigo Furuta

Takao Motoyama

Provided is a compound represented by Chemical Formula 1 capable of manufacturing an EL device by inkjet printing. In Chemical Formula 1,

Compounds, liquid compositions including compounds, and electroluminescent devices

A copolymer including a structural unit represented by Chemical Formula 1 wherein the copolymer is capable of improving luminous efficiency and durability, particularly, an improvement in luminescence life-span, of an electroluminescence device, particularly a quantum dot electroluminescence device.

Copolymer, electroluminescence device material including copolymer, and electroluminescence device

An imaging device includes a photoelectric conversion device including a sequential stack of an anode, a hole transport buffer layer, a photoelectric conversion layer, an electron transport buffer layer, and a cathode. The photoelectric conversion layer includes a p-type organic semiconductor and an n-type organic semiconductor. The electron transport buffer layer includes a compound represented by General Formula (1), and the p-type organic semiconductor includes a compound represented by General Formula (2): In General Formulas (1) and (2), Ar, Rto R, Ar, Rto R, Arand Ar, and Gand Gare as defined in the specification.

Imaging devices and imaging apparatuses

Disclosed is a copolymer including a structural unit represented by Chemical Formula 1 capable of improving performance (particularly durability) of an electroluminescent device.

Copolymer, electroluminescent device material including copolymer, and electroluminescent device

A copolymer, including a structural unit represented by Chemical Formula 1, a structural unit represented by Chemical Formula 2, or a combination thereof: wherein R, R, R, X, X, and Arare as provided herein.

A device includes a first electrode and a second electrode, an active layer between the first electrode and the second electrode and a plurality of auxiliary layers between the first electrode and the active layer. The auxiliary layers include first and second auxiliary layers, the first auxiliary layer proximate to the active layer, the second auxiliary layer proximate to the second electrode. An energy level of the active layer, an energy level of the first auxiliary layer, an energy level of the second auxiliary layer, and a work function of the first electrode become deeper sequentially or shallower sequentially.

Devices and sensors and electronic devices

Provided are a p-type organic semiconductor represented by Chemical Formula (1), which has improved thermal resistance and may detect near-infrared light, and a photoelectric conversion film, a photoelectric conversion device, and an image sensor including the same:  In Chemical Formula (1), Rand Rare independently a substituted or unsubstituted C1 to C30 alkyl group, and Rto Rare independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, an oxy group substituted with a substituted or unsubstituted heterocyclic group, a thio group substituted with a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amino group.

P-type organic semiconductor, composition, photoelectric conversion film, photoelectric conversion device, and image sensor

An organic electroluminescent (EL) device having improved emission efficiency and emission lifetime. An embodiment of the organic EL device of the present disclosure includes a plurality of hole transport layers between an anode and an emission layer. The plurality of the hole transport layers may include an anode-side hole transport layer, a middle hole transport layer, and an emission layer-side hole transport layer. The emission layer-side hole transport layer may include an emission layer-side hole transport material represented by the following Formula 1: 

Organic electroluminescent device

An organic light emitting diode (OLED) display is disclosed. The display has high contrast and displays good black color by removing or decreasing influence of ambient light. The display includes an organic electro-luminescence emission layer and a plurality of pixels respectively including an active lighting layer disposed on the organic electro-luminescence emission layer. In the pixels, when the organic electro-luminescence emission layer emits light, light transmittance of the active lighting layer is decreased.

Growing community of inventors

Yokohama, Japan

Naotoshi Suganuma