| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5360980 | Applied Surface Science | 2014 | 5 Pages |
Abstract
ZnSe nanocrystals (NCs) were synthesized using a microwave activated method. Synthesized NCs were characterized by means of X-ray diffraction (XRD), UV-visible (UV-vis) optical spectroscopy and photoluminescence (PL). XRD analysis demonstrated cubic zinc blende NCs. TEM image indicated round shape NCs and most of the particles had diameters of about 3Â nm. Band gap of the NCs was obtained about 3.15Â eV and PL spectra indicates a broad emission with two peaks located about 415 and 500Â nm related to band edge and trap state respectively. For ZnSe:Cu NCs, PL intensity of band gap emission of ZnSe NCs at 415Â nm decreased gradually with the increase in the concentration of Cu dopant ions and for precursor ratio of Cu:Zn 1% band gap emission at 415Â nm disappeared completely. At the same conditions, PL QY was obtained about 2% and 8% for ZnSe and ZnSe:Cu (1%) NCs, respectively.
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Authors
M. Molaei, A.R. Khezripour, M. Karimipour,