用磷光材料Ir (ppy)3 制备了高效率顶部发射绿色有机发光二极管(OLED) ,器件的结构为: ITO/ Ag/NPB/ Ir (ppy) 3 (5 wt ) :TPBI/ TPBI/ LiF/ Al。研究发现与传统的无微腔结构器件相比顶部发射器件的性能有大幅度提高-With a phosphorescent material Ir (ppy) 3 was prepared by high-efficiency green organic light-emitting diode top e