采用不同的真空热梯度升华条件，获得了不同纯度的乙酰丙酮酸二(2-苯基吡啶)铱Ir(ppy)2(acac)。以不同纯度Ir(ppy)2(acac)为客体材料，制备了结构为ITO∶MoO3/CBP/CBP∶Ir(ppy)2(acac)/TPBi/LiF∶Al的有机发光二极管（OLEDs），其中CBP和TPBi分别是4,4′-二（9-咔唑）联苯和1,3,5-三(1-苯基-1H-苯并咪唑-2-基)苯。评价了不同纯度磷光铱配合物制备的器件的电致发光性能，探索了磷光铱配合物纯度对器件性能的影响。结果表明：Ir(ppy)2(acac)升华后可以提高器件的稳定性，纯度高的材料可以在较低的掺杂浓度下获得较高的发光效率。

Ir(ppy)2(acac) with different purity levels were obtained by adopting various thermal gradient vacuum sublimation conditions, and were used as phosphorescence dopants in OLEDs with a structure of ITO∶MoO3/CBP/CBP∶Ir(ppy)2(acac)/TPBi/LiF/Al, where CBP and TPBi were the abbreviations of 4,4′-N,N′-dicarbazole-biphenyl and 1,3,5-tris(N-phenylbenzimidazole-2-yl) benzene, respectively. The electroluminescent performances of Ir(ppy)2(acac) were evaluated and the effect of purity levels was explored. The results indicate that sublimation improves electroluminescent stability of the device, and a higher purity level endows the device with greater electroluminescent efficiency even at a low doping concentration.