ABSTRACT
Efficient Light-emitting-diode (LED) constructed of CdSe/Si CdSe nano particles were synthesized through thermal evaporation method using tube furnace and Ar as carrier gas. The synthesized nanoparticles were subjected to structural, optical, morphological, and electrical investigation. The nanoparticles structural properties studied by X-Ray diffraction, confirm the formation of hexagonal structure of CdSe (NPs). The preferred growth direction toward (100) orientation. Crystallite size was calculated by Scherrer’s equation. The surface morphology formation studied by Scanning Electron Microscopy (SEM) and average grain size also has been calculated. FESEM images revel sheets and tetra pods constructed of nano particles with average size 15-40 nm. Ultraviolet-visible (UV-Vis) absorption spectrum showed the absorption peak of CdSe at 350 nm. PL measurements show the emission peaks at 641 and 678 nm. The results of (I-V) measurements show the large ratio between the darkness and light state, which shows the correct behavior of LEDs. The ideality factor was estimated at the optimum conditions and it has been found (1.18).
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