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چکیده
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A novel/general method, based on a combination of co-nucleation and growth doping strategies in aqueous media is suggested to synthesize tunable-luminescent Fe-doped ZnCdSe/ZnS core/shell quantum dots (QDs). The effective doping of Fe impurity and enhancing the emission intensity along with localization of Cd2+ ions within the core lattice structure are all the advantages for utilizing a larger bandgap ZnS shell. The emission tunability of the doped QDs (d-dots) over the visible range was also achieved by controlling the Zn:Cd feeding ratio in ZnCdSe host matrix, so that the particle size does not change, but the bandgap energy alters significantly. The structural analyzes represent zinc blend cubic structure for d-dots, with sufficient surface passivating by N-acetyl-L-cysteine molecules and less than 10 nm in size. Despite the simplicity, cost-effectiveness, the low temperature used and relatively small duration of time, the tunable emission properties of the present novel core/shell d-dots are remarkable, which nominate them with promising potential in the light emitting diodes and other optoelectronic devices.
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