Enhanced efficiency of white polymer light-emitting diodes (PLEDs) was observed by incorporating polysilicic acid (PSA) nanodots into the hole-injection layer (HIL). The PLEDs employed three different phosphorescent dyes in a single emissive layer with a host polymer of poly(vinylcarbazole) (PVK). The optimal composition of the phosphorescent dyes has been found to accomplish the white emission. By incorporating 1.5 wt% of PSA nanodots into the HIL, the maximum efficiency has been found to increase about 65%, from 13.7 cd/A to 22.9 cd/A. This remarkable improvement in efficiency may be attributed to the introduction of the PSA nanodots, which leads to the better carrier balance in the PLEDs.
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机译：通过将聚硅酸（PSA）纳米点结合到空穴注入层（HIL）中，观察到白色聚合物发光二极管（PLED）的效率提高。 PLED在具有聚（乙烯基咔唑）（PVK）主体聚合物的单个发光层中采用了三种不同的磷光染料。已经发现磷光染料的最佳组成可以实现白色发射。通过将1.5 wt％的PSA纳米点掺入HIL中，发现最大效率从13.7 cd / A增至22.9 cd / A，提高了约65％。效率的这一显着提高可能归因于PSA纳米点的引入，这导致了PLED中更好的载流子平衡。
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