Tsinghua University

Beijing Visionox Technology Co., Ltd.

Kunshan Visionox Display Co., Ltd.

Beijing Visionox Technology

Deqiang Zhang

Yong Qiu

Yudi Gao

Yang Li

Lian Duan

Guohui Zhang

Kongwu Wu

Liduo Wang

Peng Wei

Wang Liduo

The present invention relates to a method of preparing a Li film, wherein said Li film is fabricated by directly decomposing a compound of Li under a vacuum evaporation condition, and said compound is LiN. Said Li film is fabricated by decomposing LiN at an evaporation rate of 0.01-0.25 nm/s and an evaporation temperature of 300-450&#xb0; C., and said Li film has a thickness of 0.3-5.0 nm. The present invention also relates to an organic light emitting device comprising said Li film as an electron injection layer and a method for the preparation thereof, and an organic light emitting device including an electron injection layer comprising an electron transport material doped with Li obtained by decomposing LiN under a vacuum evaporation condition, and a method for the preparation thereof.

Methods of preparing a Li film and methods of preparing an organic light emitting device

The present invention relates to an organic electroluminescence device comprising a substrate, an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and a cathode, wherein the electron injection layer contains alkali metal nitride and has a thickness of 0.2-10 nm. The organic electroluminescence device of the present invention has improved electron injection from the cathode to the organic layer, high device luminance and efficiency, long device lifetime, low material poisonousness, wide choice of film-forming thickness and low film-forming temperature.

Organic electroluminescence device

The present invention relates to an organic electroluminescence device and provides a new material composition scheme for an electron injection layer. The organic electroluminescence device of the present invention includes an electron injection layer which contains a material represented by formula ABO, wherein A is one of an alkali metal and an alkali earth metal, B is one of group VIII metals and 0&#x3c;x&#x2266;2, 0&#x3c;y&#x2266;3, 0&#x3c;z&#x2266;6. A is selected from one of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr and Ba. B is selected from one of Fe, Co, Ni, Ru, Rh, Pd, Os, Ir and Pt. The electron injection layer can be formed of Al and ABO. The electron injection layer has high electron injection ability, and the device has low threshold voltage, high luminance, high efficiency and long life.

Electron injection layer material for organic electroluminescence device

An organic light-emitting device including a transparent substrate, a first electrode layer, a second electrode layer, a hole-transporting layer, and a electron-transporting layer sandwiched between the first and second electrode layers, wherein the hole-transporting layer consists of organic multiple-quantum-well structure. The multiple-quantum-well structure has a period number of alternating layers formed of a layer of organic material A with wide energy gap and a layer of organic material B with narrow energy gap. Organic material A and organic material B are selected such that the highest occupied molecular orbital (HOMO) levels of organic material A are lower than those of organic material B and the lowest unoccupied molecular orbital (LUMO) levels of organic material A are higher than those of organic material B.

Organic light-emitting devices

Growing community of inventors

Beijing, China

Deqiang Zhang