Abstract
The thermal evaporation method can easily be employed to fabricate hybrid inorganic-organic LEDs and the emission properties can be controlled by varying the thickness of the nanocrystalline CdTe film. The fabrication of CdTe nanocrystals on glass substrates was demonstrated using a thermal evaporation method. Films were characterised using various experimental tools, such as SEM, TEM, AFM, UV-Vis and PL spectroscopy. The formation of nanoparticles with diameters from 1.5 nm up to 9 nm was observed in the nanocrystalline thin films. The organic light emitting diodes (OLEDs) based on these nanocrystals as an emissive layer exhibit electroluminescence (EL) in the green to yellow region of the visible spectrum, which is ascribed to the varying size dependent EL from the nanocrystals of CdTe present in the thin film. The method demonstrates an easy and convenient way to incorporate inorganic CdTe nanocrystals inside the organic light emitting devices.
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