| abstract |
The invention provides an organic electroluminescent device which is excellent in heat resistance and weather resistance, emits light at a low voltage with high brightness, maintains stable luminescence characteristics in driving, and can be produced under broad process conditions. It comprises a substrate (1) having a luminescent layer (3) held between an anode (2) and a cathode (4). The cathode (4) comprises a metallic material, an alkali metal, and an oxygen atom. The cathode is formed by simultaneous vacuum deposition using a metallic material and an organic compound containing an alkali metal as deposition sources. |