The present invention relates to a low-voltage organic electroluminescent device having improved stability, comprising: an organic electroluminescent device including an anode transparent electrode, a p-type thin film, an electron transport layer, and an n-type thin film serving as an organic light emitting layer, and a cathode metal electrode. In the production method, a mixture of the doped polyaniline prepared by doping the poly-aniline having a repeating unit of formula (I) with the p-type thin film layer and the aromatic polyimide precursor having a repeating unit of formula (II) Coating to prepare a thin film, it characterized in that it is prepared by thermal imidization.
展开▼
