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设计并合成了两种有机电致发光材料,Ir(ppi)2acac和Ir(MeO-ppi)2acac,其中ppi和MeO-ppi分别为2-苯基苯并咪唑和2-(4′-甲氧基苯基)苯并咪唑,acac=乙酰丙酮,Ir(ppi)2acac和Ir(MeO-ppi)2ac,Ir(Ⅲ)配合物在二氯甲烷溶液中的磷光寿命(τ)分别为52.0和43.6ns,在CBP 薄膜中的τ分别为3.7和3.3ns,如此短的三重态寿命目前尚未看到报道.研究发现高效的Ir(ppi)2acac的绿电光致发光(EL)性能与短三重态寿命密切相关,7%(质量分数)Ir(ppi)2acac掺杂的器件给出55060cd/m2的最高亮度(L),对应13.4% 最大外量子效率(η),比Ir(ppy)3掺杂的参考器件提高了67.5%.

参考文献

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