| abstract |
The present invention relates to an electron buffer material, and an organic electroluminescent device comprising a first electrode, a second electrode facing the first electrode, a light-emitting layer between the first electrode and the second electrode, and a light-emitting layer between the light-emitting layer and the second electrode. Electron transport region and electron buffer layer between electrodes. The organic electroluminescent device comprising the electron buffer material of the present invention has low driving voltage, excellent luminous efficacy and long service life. |