| abstract |
Disclosed is an organic EL device comprising an electron buffer material, a first electrode, a second electrode opposite to the first electrode, a light emitting layer disposed between the two electrodes, and a light emitting layer disposed between the light emitting layer and the The electron transport region and the electron buffer layer between the second electrodes. The organic EL device including the electron buffer material of the present disclosure has low driving voltage, high luminous efficiency and excellent lifetime. |