Samsung Display Co., Ltd.

Lg Display Co., Ltd.

Hyun-Ju Choi

Chang-Ho Lee

Hee-Joo Ko

Beom Joon Kim

Chang-Min Lee

Se-Jin Cho

Jin-Young Yun

Dae-Yup Shin

Il-Soo Oh

Young-Mok Son

Bo-Ra Lee

Beom-Joon Kim

Pyung-Eun Jeon

Jeong-Dae Seo

Chang-Wook Han

Yeon-woo Lee

Yoon-Heung Tak

Myung-Seop Kim

Se Jin Cho

In Jae Lee

Joong Won Sim

Jong-Moo Lee

Provided is an organic light-emitting device including a first electrode, a second electrode disposed opposite to the first electrode, an emission layer disposed between the first electrode and the second electrode, and an electron-transporting layer disposed between the emission layer and the second electrode. The electron-transporting layer includes a first electron-transporting material and a second electron-transporting material. The lowest unoccupied molecular orbital (LUMO) energy level of the first electron-transporting material (EL) and the lowest unoccupied molecular orbital (LUMO) energy level of the second electron-transporting material (EL) satisfy the equation 0.1 eV&#x2266;|EL&#x2212;EL|&#x2266;0.3 eV.

Organic light-emitting device

An organic light emitting diode includes a hole injection layer, a hole transport layer, an emission layer, an electron transport layer and an electron injection layer. The hole transport layer is disposed on the hole injection layer. The emission layer is disposed on the hole transport layer. The electron transport layer is disposed on the emission layer and including at least one selected from an anthracene derivative and a pyrene derivative. The electron injection layer is disposed on the electron transport layer. The organic light emitting diode includes a material that electron mobility is lower than a traditional material of the electron transport layer. Thus, a stain and a roll-off phenomenon in the low gray scale area may be improved.

Organic light emitting diode and organic light emitting display apparatus having the same

Organic light-emitting device using a mixture of electron transporting compounds

An organic light emitting diode includes a hole injection layer, a hole transport layer, an optical compensation layer, an emission layer, an electron transport layer and an electron injection layer. The optical compensation layer is disposed on the hole transport layer and includes a phosphorescent host material. Thus, an electron barrier on an interface between the optical compensation layer and an emission layer may be reduced. Thus, the luminance efficiency in a low gray scale area may be decreased, and the stain and roll-off phenomenon in the low gray scale area may be improved.

A an organic electroluminescent display device includes an array substrate including a driving thin film transistor in a pixel region on a first substrate; an opposing substrate including an organic electroluminescent diode in the pixel region on a second substrate; an adhesive layer filling a space between the array substrate and the opposing substrate; and a connection spacer to electrically connect the organic electroluminescent diode with the driving thin film transistor.

Organic electroluminescent display device and method and apparatus of manufacturing the same

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Seoul, South Korea

Hyun-Ju Choi