An alloy cathode and preparation method oled

The present invention provides a method for preparing OLED alloy and a cathode, the cathode alloy of Ca, Mg, Al ternary alloy. Ca, Mg, Al proportion by mass of metal Ca: Mg: Al = 15% :( 5% -25%) :( 80% -60%) mixture; Ca, Mg, Al molten metal vacuum to vacuum conditions under a natural cooling after the formation of the molten quartz glass tube. Calcium and magnesium alloy cathode of the present invention can increase the transmission capacity of the cathode, its performance is superior Ca: Al alloy cathode of the OLED device, and a calcium magnesium aluminum cathode by evaporation boat to evaporation, not only reduces the difficulty of the operation, and the film thick easier to control, more accurate results.