Samsung Display Co., Ltd.

Soonchul Chang

Pilgu Kang

Seulong Kim

Youngmin Moon

Sungsoon Im

Taekyung Kim

Minho Moon

Jiyoung Kwon

Jaehoon Hwang

Jaeyong Lee

Minkyung Kim

Kyuhwan Hwang

Sunwoo Kang

Seungyong Song

Jaesik Kim

Taewook Kang

Hajin Song

Kyu Hwan Hwang

Dongseob Jeong

Hyekyun Lee

Yangjin Cho

Eungyoung Park

Jiyoung Song

Dahye Cho

Jina Hur

Provided are an organic light-emitting device having improved luminescent efficiency and a compound.

Organic light-emitting device and compound

An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission region between the first electrode and the second electrode and including a first emission layer and a second emission layer; and a hole blocking layer between the first emission layer and the first electrode, or between the second emission layer and the second electrode, wherein the second emission layer may be between the first emission layer and the hole blocking layer, the first emission layer may include a first host and a first light-emitting material, the second emission layer may include a second host and a second light-emitting material, and the first light-emitting material and the second light-emitting material may respectively be included in the first emission layer and the second emission layer at an identical ratio.

Organic light-emitting device

Provided are an organic-light-emitting device and a display apparatus including the same. The 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 and including at least one light-emitting unit, wherein the at least one light-emitting unit includes: an emission layer; and a hole transport region between the first electrode and the emission layer and including a first hole transport (HT) layer, the emission layer includes a host, the first HT layer includes a first compound, a minimum bond dissociation energy (BDE) of the first compound is larger than a triplet energy (T) of the host, and a minimum bond dissociation energy (BDE) of the host is larger than the triplet energy (T) of the host.

Organic light-emitting device and display apparatus including the same

A condensed cyclic compound is represented by Formula 1. An organic light-emitting device includes: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode and comprising an emission layer, the organic layer including the condensed cyclic compound represented by Formula 1. A display apparatus includes: a thin-film transistor comprising a source electrode, a drain electrode, and an active layer; and the organic light-emitting device.

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

A mask assembly, and an apparatus including the same are provided. The mask assembly includes a mask sheet. The mask sheet includes a pattern portion having openings, and a welding portion connected to the pattern portion. The welding portion has a grain size different from a grain size of the pattern portion.

Mask assembly, method of manufacturing thereof, and apparatus including the same

A method of manufacturing a mask includes forming a first hole in a base material using a laser, the first hole penetrating through the base material from a first surface to a second surface different than the first surface, and expanding the first hole using an etchant to form a second hole.

Method of manufacturing a mask

A mask assembly includes: a mask frame; and a mask sheet disposed on the mask frame, wherein the mask sheet is stretched by applying tensile force and affixed onto the mask frame, wherein the mask sheet includes a pattern including a plurality of openings, and wherein a thickness of the pattern is different from thicknesses of other portions of the mask sheet.

Mask assembly and apparatus and method of manufacturing display apparatus using the same

A deposition mask including a mask body including a plurality of pattern holes; a plurality of protrusions protruding from the mask body; and a plurality of grooves formed in the mask body. A grain size of the mask body is in arrange of about 10 &#x3bc;m to about 1000 &#x3bc;m, and a difference between a maximum height of the plurality of protrusions and a maximum height of the plurality of grooves is equal to or less than 0.5 &#x3bc;m.

Deposition mask, method of manufacturing deposition mask, and method of manufacturing display apparatus

Growing community of inventors

Yongin-si, South Korea

Soonchul Chang