| 摘要 |
The present invention relates to an organic electroluminescent device comprising an anode, a cathode, an emission layer, an undoped electron transport layer comprising a first matrix compound, and an electron injection layer comprising a second matrix compound and an alkali organic complex and/or alkali halide, wherein the undoped electron transport layer and the electron injection layer are arranged between the emission layer and the cathode, wherein the reduction potential of the first matrix compound is less negative than the reduction potential of 9, 10-di(naphthalen-2-yl)anthracene and more negative than the reduction potential of 4,4'-bis(4,6-diphenyl-1,3,5-triazin-2-yl)biphenyl, wherein the reduction potential in both cases is measured against Fc/Fc + in tetrahydrofurane; and the dipole moment of the first matrix compound is selected ‰¥ 0 Debye and ‰¤ 2.5 Debye and the dipole moment of the second matrix compound is selected > 2.5 and < 10 Debye. |
