Abstract: The invention provides a red organic electroluminescent device, composed of a substrate, an anode layer, an anode modification layer, a hole transporting-electron blocking layer, a hole-dominated light-emitting layer, an electron-dominated light-emitting layer, a hole blocking-electron transporting layer, a cathode modification layer, and a cathode layer arranged in turn, wherein the electron-dominated light-emitting layer is composed of an organic sensitive material, a red organic light-emitting material, and an electron-type organic host material.

Abstract: The invention relates to a method for producing a magnesium-rare earth intermediate alloy, which belongs to the technical field of molten salt electrolytic metallurgical technology. Inside an electrolysis oven, magnesium chloride, lanthanum praseodymium cerium chloride and potassium chloride in a controlled mass ratio of 5:(40-35):(55-60) are formulated as electrolyte composition, and the electrolysis is performed under a temperature of 800-900° C., a cathode current density of 10-30 A/cm2, and a distance between the electrodes of 4 to 8 cm; and the lanthanum praseodymium cerium chloride and the magnesium chloride are added in a mass ratio of 1:1.5-5 during the electrolysis, thus the magnesium-lanthanum praseodymium cerium intermediate alloy is produced.