| abstract |
The invention provides a red organic electroluminescent device, composed of a substrate (1), an anode layer (2), an anode modification layer (3), a hole transporting-electron blocking layer (4), a hole-dominated light-emitting layer (5), an electron-dominated light-emitting layer (6), a hole blocking-electron transporting layer (7), a cathode modification layer (8), and a cathode layer (9) arranged in turn, wherein the electron-dominated light-emitting layer (6) is composed of an organic sensitive material, a red organic light-emitting material, and an electron-type organic host material. A rare earth complex having a matched energy level, such as Eu(DBM) 3 phen or Eu(TTA) 3 phen is selected as the organic sensitive material, and a trace amount of the same is doped into the electron-dominated light-emitting layer (6), which has the function of an energy transporting ladder and a deep binding center for charge carriers, so as to improve the light-emitting effectiveness, spectral stability, and service life of the device, reduce the operating voltage of the device, and delay the attenuation of the effectiveness of the device. |