Preparation, characterization and electroluminescence of ZnS nanocrystals in a polymer matrix

ZnS nanocrystals have been synthesized in polymer matrices. Absorption spectrum and small-angle X-ray scattering studies showed that the size of the ZnS nanoparticles was ca. 3.0 nm. Electron diffraction results showed that the ZnS nanocrystals have hexagonal structure. A ZnS nanoparticle/polymer composite as an emitter was used to fabricate a single layer structure electroluminescent device with a low turn-on voltage (less than or equal to 4 V) and blue electroluminescence was observed at room temperature.