مشخصات پژوهش

صفحه نخست /Facile and versatile ...
عنوان Facile and versatile preparation of full-color emissive Fe-doped ZnCdSe/ZnS core/shell quantum dots by a novel aqueous-based colloidal approach
نوع پژوهش مقاله چاپ‌شده
کلیدواژه‌ها Luminescence, Fe-doped ZnCdSe, Core/shell QDs, Full-color emission
چکیده 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 tenability 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 Nacetyl- 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.
پژوهشگران غلامرضا نبیونی (نفر سوم)، رضا صحرایی (نفر دوم)، احسان سهیلی (نفر اول)