利用高真空多源型有机分子沉积系统分别制备了不同负电极为Al、LiF/Al和Mg∶Ag的有机小分子多层电致发光器件 ,比较了不同负极对以五苯基环戊二烯 (PPCP)为发光层的蓝光有机电致发光器件性能的影响 ,发现以LiF/Al作负极的器件在综合性能上优于其它器件。其中器件ITO/TPD/PPCP/Alq/LiF/Al蓝光发射的最大发光亮度达 2 3 75cd/m2 ,最大发光效率为 0 2 6lm/W。 Organic low molecular multilayer electroluminescent devices with different negative electrodes of Al, LiF / Al and Mg: Ag were prepared by using high vacuum multi-source organic molecular deposition system. The effects of different negative pairs on the photocatalytic activity of pentapentylcyclopentadiene PPCP) as the light-emitting layer of blue organic light-emitting device performance and found that LiF / Al as the anode device in the overall performance superior to other devices. Among them, the maximum luminance of ITO / TPD / PPCP / Alq / LiF / Al blue light emission is 2375cd / m2 and the maximum luminous efficiency is 0.261m / W.