Mixture of quantum dots and ZnS nanoparticles as emissive layer for improved quantum dots light emitting diodes

摘要: Recently, quantum dots based light-emitting diodes (QLEDs) have received huge attention due to the properties of (QDs), such as high photoluminescence yield (PLQY) and narrow emission. To improve performance QLEDs, reducing non-radiative energy transfer is critical. So far, most conventional methods required additional chemical treatment like giant shell and/or ligands exchange. However that triggers unsought shifted emission or reduced PLQY QDs. In this work, we firstly suggested a novel approach efficiency QLEDs by introducing inorganic nanoparticles (NPs) spacer between QDs, without treatment. As ZnS NPs formed mixture layer with was distance QDs increased, leading improved layer. result, current (CE) QLED device twice compared one using only This an early report on utilizing efficient spacer, which can be utilized other compositions