We have developed highly efficient white organic light-emitting devices using a multilayer emission structure consisting of a single host layer. The red phosphorescent, tris(2-phenyl-1-quinoline)iridium(III) [Ir(phq)_3], and the blue phosphorescent, iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N, C2/]picolinate (FIrpic), are doped into separate layers of N,N'-dicarbazolyl-3, 5-benzene (mCP) host. The FIrpic and Ir(phq)_3 guest molecules are directly excited by direct recombination on these molecules. A maximum external quantum efficiency of 20.3% and a current efficiency of 45.6 cd A-1 are achieved by optimizing charge balance, which is a major factor in achieving high efficiency in the mCP: FIrpic/mCP: Ir(phq)_3 single host structure.
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机译：我们已经开发了使用由单个主体层组成的多层发射结构的高效白色有机发光器件。红色磷光的三（2-苯基-1-喹啉）铱（III）[Ir（phq）_3]和蓝色磷光的铱（III）双[（4,6-二氟苯基）-吡啶鎓-N将C 2 /]吡啶甲酸酯（FIrpic）掺杂到N，N'-二咔唑基-3，5-苯（mCP）主体的单独层中。 FIrpic和Ir（phq）_3客体分子通过在这些分子上的直接重组而直接被激发。通过优化电荷平衡，可以达到20.3％的最大外部量子效率和45.6 cd A-1的电流效率，这是在mCP：FIrpic / mCP：Ir（phq）_3单主体结构中实现高效率的主要因素。
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