Thiol-capped CdTe nanocrystals were used to fabricate light-emitting diodes,consisting of an emissive nanocrystal multilayer deposited via layer-by-layer,sandwiched between indium-tin-oxide and aluminum electrodes. The emissive andelectrical properties of devices with different numbers of nanocrystal layerswere studied. The improved structural homogeneity of the nanocrystal multilayerallowed for stable and repeatable current- and electroluminescence-voltagecharacteristics. These indicate that both current and electroluminescence areelectric-field dependent. Devices were operated under ambient conditions and aclear red-light was detected. The best-performing device shows a peak externalefficiency of 0.51% and was measured at 0.35mA/cm2 and 3.3V.
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