| abstract |
A red organic electroluminescent device, composed of a substrate (1), an anode layer (2), an anode modification layer (3), a hole transport-electron blocking layer (4), a hole-dominated light-emitting layer (5), an electron-dominated light-emitting layer (6), a hole blocking-electron transport layer (7), a cathode modification layer (8), and a cathode layer (9) arranged in sequence; the electron-dominated layer (6) is composed of organic sensitised material, red organic light-emitting material, and electron-type organic host material. Selecting rare earth complexes of matching energy levels such as EU (DBM) 3 phen or EU (TTA) 3 phen as the organic sensitised material, and doping trace amounts of same into the electron-dominated light-emitting layer (6), which has the function of a charge carrier deep binding centre and an energy transport ladder, improves the light-emitting effectiveness, spectral stability, and service life of the device, reduces the operating voltage of the device, and delays the attenuation of effectiveness of the device. |