Samsung Display Co., Ltd.

Korea Advanced Institute of Science and Technology

Industry-academic Cooperation Foundation Gyeongsang National University

Jihyun Seo

Mikyung Kim

Seunggak Yang

Jaehyun Lee

Yunjee Park

Hanbyul Jang

Jiwon Kwak

Seulong Kim

Jungsub Lee

Kwanhee Lee

Naoyuki Ito

Dongwoo Shin

Hyein Jeong

Jino Lim

Changwoong Chu

Yunhi Kim

Heeyeon Kim

Soonki Kwon

Yunho Lee

Byounghee Park

Yeong-Eun Kim

Sungkyung Kim

Hyerim Kim

Hyunsu Shin

A light-emitting device includes a hole transport region including two layers each including a Compound A group, a Compound B group, or any combination thereof, wherein the Compound A group includes one or two amine groups, and the amine group includes a fluorene moiety, a carbazole moiety, a dibenzofuran moiety, a dibenzothiophene moiety, a dibenzosilole moiety, or any combination thereof, and the Compound B group does not includes an amine group, and includes a fluorene moiety, a carbazole moiety, a dibenzofuran moiety, a dibenzothiophene moiety, a dibenzosilole moiety, or any combination thereof.

Light-emitting device and electronic apparatus including the same

An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an organic layer disposed between the first electrode and the second electrode and includes an emission layer; and a first compound and a second compound; wherein the first compound includes a hole transport compound not including an electron transport moiety, and the second compound includes an electron transport compound including an electron transport moiety or a bipolar compound including an electron transport moiety, wherein the second compound includes deuterium.

Organic light-emitting device and apparatus including the same

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer disposed between the first electrode and the second electrode and having an emission layer, wherein the interlayer includes: i) a hole transport region disposed between the first electrode and the emission layer; and ii) an electron transport region disposed between the emission layer and the second electrode; wherein: the emission layer includes three or more hosts; the electron transport region includes a buffer layer; the three or more hosts include a hole transport host, a first electron transport host, and a second electron transport host; the buffer layer includes a third electron transport host; and a lowest unoccupied molecular orbital energy level of the second electron transport host is substantially equal to a lowest unoccupied molecular orbital energy level of the third electron transport host.

An organic light-emitting device and a display apparatus including the organic light-emitting device includes a light emitting layer having one or more host materials having unexpectedly low driving voltage, high efficiency and a long life span.

Organic light-emitting device and display apparatus including organic light-emitting device

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, wherein the organic layer includes an emission layer and at least one organometallic compound of Formula 1.  An organic light-emitting device including an organometallic compound of Formula 1 may have low driving voltage, high efficiency, and excellent color purity.

Organometallic compound and organic light-emitting device including the same

An organometallic complex represented by Formula 1-1 or Formula 1-2 is provided: wherein in Formulae 1-1 and 1-2, descriptions of Rto R, X, X, Yto Y, rings A, B, C, and a to e are understood by referring to the description provided herein. An organic light-emitting device includes a first electrode, a second electrode facing the first electrode, and an organic layer that is disposed between the first electrode and the second electrode and includes an emission layer, wherein the organic layer includes at least one organometallic complex represented by Formula 1-1 or Formula 1-2.

Organometallic complex and organic light-emitting device including the same

An organic light-emitting device and a flat panel display apparatus, 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 hole transport region between the first electrode and the emission layer, the hole transport region including an auxiliary layer and at least one selected from a hole transport layer and a hole injection layer, and an electron transport region between the emission layer and the second electrode, the electron transport region including at least one selected from a hole blocking layer, an electron transport layer, and an electron injection layer, wherein the auxiliary layer includes a compound represented by Formula 1 and a compound represented by Formula 2: 

Organic light-emitting device

An organic light-emitting device includes an organic layer including an emission layer between a first electrode and the second electrode, and a hole transport region including an auxiliary layer between the first electrode and the emission layer, the hole transport region. The auxiliary layer includes a first material and a second material that satisfy Equations 1-1 and 1-2:0 eV&#x3c;&#x2266;0.6 eV&#x2003;&#x2003;&#x3c;Equation 1-1&#x3e;0 eV&#x3c;&#x2266;0.6 eV&#x2003;&#x2003;&#x3c;Equation 1-2&#x3e;wherein in Equation 1-1 and 1-2, Eis a highest occupied molecular orbital energy (HOMO energy) of the first material; Eis a lowest unoccupied molecular orbital energy (LUMO energy) of the first material; Eis a HOMO energy of the second material; and Eis a LUMO energy of the second material.

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Yongin-si, South Korea

Jihyun Seo