Lg Display Co., Ltd.

Gwi-Jeong Cho

So-Yeon Ahn

Jeong-Haeng Heo

Jae-Man Lee

Tae-Shick Kim

Hee-Dong Choi

Hong-Seok Choi

Chang-Wook Han

Eun-Jung Park

Shin-Han Kim

Byung-soo Kim

Hwa-Kyung Kim

Mi-Young Han

Seung-Ryong Joung

Seok-Jong Lee

Youn-Seok Kam

Sung-Hoon Choi

Sang-Dae Kim

Seong-Su Jeon

Hye-Min Oh

Jeong-Kyun Shin

Young-Dock Cho

Hong-Je Yun

Chi-Yul Song

Kyu-II Han

Tae-II Kum

An organic light emitting device includes a substrate, a first electrode on the substrate, a second electrode, a first stack on the first electrode and including a hole injection layer, a first hole transport layer, a first mixed layer, a second hole transport layer, a first light emitting layer, and a first electron transport layer sequentially laminated, a second stack between the first stack and the second electrode and including a third hole transport layer, a fourth hole transport layer, a second light emitting layer, and a second electron transport layer sequentially laminated, and a charge generation layer between the first stack and the second stack to control charge balance between the first and second stacks. The first mixed layer includes materials used to form the first and second hole transport layers.

Organic light emitting device and method of fabricating the same

An organic electroluminescent device and organic electroluminescent display device having enhanced efficiency are discussed. In one example, the organic electroluminescent device includes first and second electrodes facing each other on a substrate and at least two emission layers formed between the first and second electrodes and realizing blue light, wherein, among the emission layers, a first blue emission layer close to the first electrode includes a first blue dopant having a different maximum luminescence wavelength than that of a second blue dopant of a second blue emission layer close to the second electrode.

Organic electroluminescent device and organic electroluminescent display device

Disclosed is an organic light emitting display device with an enhanced light emission efficiency at high current and an enhancement in panel efficiency through prevention of a roll-off phenomenon. The organic light emitting display device includes first and second electrodes formed on a substrate facing each other. A hole injection layer, a hole transport layer, at least first and second light emitting layers, and an electron transport layer are sequentially stacked between the first and second electrodes. The first light emitting layer includes different hosts while being doped with the same dopant in different dosages. The first light emitting layer includes a first host and a second host, and the second light emitting layer includes the first host and a third host different from the second host. The first and second light emitting layers are doped with the same phosphorescent yellow-phosphorescent green dopant in the same dosage.

Organic light emitting display device

An organic light emitting display device with improved lifespan is disclosed. The organic light emitting display device includes first and second electrodes facing each other on a substrate, at least two light emitting units formed between the first and second electrodes, an N-type charge generation layer and a P-type charge generation layer sequentially stacked between the light emitting units, and at least one auxiliary charge generation layer formed between at least any one of the P-type charge generation layer and the N-type charge generation layer and an emitting layer of the light emitting unit disposed on an upper or lower portion of the at least any one thereof and generating electrons and holes supplied to the emitting layer of the light emitting unit.

Organic light emitting display device having auxiliary charge generation layer

An organic light emitting display device includes first and second electrodes facing each other on a substrate, a first stack including a first hole transport layer, a second hole transport layer, a first emitting layer, and a first electron transport layer, the layers being sequentially stacked on the first electrode, a second stack including a third hole transport layer, a fourth hole transport layer, a second emitting layer including at least two hosts and a single dopant and having at least three emitting areas, and a second electron transport layer, the layers being sequentially stacked between the first stack and the second electrode, wherein the second emitting layer includes a first emitting area including a material of the fourth hole transport layer, a second emitting area including a material of the second electron transport layer, and a third emitting area including the at least two hosts.

An organic electroluminescent display device includes a first substrate including a display region including a plurality of pixel regions; a first electrode in each pixel region; an organic light emitting layer on the first electrode; a second electrode on the organic light emitting layer and in the display region, wherein the second electrode includes a first metal material having a first wt %, a first work function, and a first sheet resistance, and a second metal material having a second wt % less than the first wt %, a second work function less than the first work function, and a second sheet resistance greater than the first sheet resistance.

Organic electroluminescent display device

Growing community of inventors

Daegu, South Korea

Gwi-Jeong Cho