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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Solution-Process-Feasible Deep-Red Phosphorescent Emitter
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Solution-Process-Feasible Deep-Red Phosphorescent Emitter

机译:解决方案过程可行的深红色磷光发射极

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Solution processing enables organic devices to be fabricated cost-effectively, while deep-red emitters enable displays with high color saturation and lighting with high light quality. However, limited deep-red emitters were reported with solution process feasibility and high efficiency. We demonstrate here a high-efficiency, solution-process-feasible deep-red emitter by coupling the highly efficient phosphorescent complex with a highly thermally stable fluorescent compound. The device exhibits a maximum external quantum efficiency of 11.2% at 10 cd m(-2) and 8.4% at 100 cd m(-2). The latter is coupled with an ultradeep red emission (0.70, 0.27) and a potential color saturation of 108%. Besides the intrinsically high-efficiency nature of the phosphorescent complex, the record high efficiency may be attributable to the spirally configured fluorene moiety in the fluorescent compound to prevent concentration-quenching effect, a proper host to enable an effective host-to-guest energy transfer, and the employed cohost with electron-trapping character to enable a balanced carrier injection.
机译:溶液处理使有机器件的制造具有成本效益,而深红色发射器使显示器具有较高的色彩饱和度和照明的高质量。然而,据报道有限的深红色发射器具有解决方案过程的可行性和高效率。我们在此通过将高效磷光络合物与高度热稳定的荧光化合物偶联,证明了一种高效,溶液法可行的深红色发射体。该器件在10 cd m(-2)时显示的最大外部量子效率为11.2%,在100 cd m(-2)时显示的最大外部量子效率为8.4%。后者加上超深红色发射(0.70,0.27)和潜在的108%色彩饱和度。除了磷光络合物固有的高效率性质外,记录的高效率还可能归因于荧光化合物中的螺旋构型芴部分,以防止浓度猝灭效应,是实现有效的主体到客体能量转移的合适主体,并采用具有电子俘获特性的共基质,以实现平衡的载流子注入。

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