| abstract |
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 Li 3 N. Said Li film is fabricated by decomposing Li 3 N at an evaporation rate of 0.01-0.25 nm/s and an evaporation temperature of 300-450° 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 Li 3 N under a vacuum evaporation condition, and a method for the preparation thereof. |