Compared
to colloidal quantum dots, nanostructured multilayer films
may also be a promising emission layer in future light-emitting diodes,
due to their excellent photoluminescence (PL), narrow full width at
half-maximum (FWHM), and wide color gamut. In this paper, multilayer-structured
deep-blue light-emitting diodes (LEDs) were prepared, where nanostructured
ZnSe/ZnS multilayer films act as the light-emitting layer. The device
showed good blue electroluminescence (EL) spectrum locating at 448
nm with an FWHM of 31 nm. To improve the performance of the device,
the effect of preparation parameters of different layers was investigated
in detail. The results demonstrated that the preparation parameters
of each layer affected the performance in different ways, and choosing
the most suitable preparation parameters can achieve optimal performance.
Furthermore, this multilayer-structured device based on nanostructured
films as emission layer can also be applied in green and red LEDs
or all-inorganic QLEDs.
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