| Optoelectronic characteristics of Cd1-xNixSe quantum dots |
| Paper ID : 1012-ISCHU |
| Authors |
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Abdelrahman Mohamed Ali *1, Gad Mansour1, Mohamed Alkordi2, Amin Fahem1, Mohamed Mansour Elnicklawy1 1Physics department of Faculty of Science helwan university 2Professor of Chemistry and Material Science Zewail city of science and technology |
| Abstract |
| Optoelectronic properties of Cd1-xNixSe quantum dots with different Ni dopant were comprehensively investigated. Co-precipitation method in aqueous solution was used to prepare the Ni-doped CdSe quantum dots samples. The samples were examined structurally, morphology by using X- ray Diffraction (XRD) and Transmission Electron Microscope (TEM) techniques, respectively. The analysis of the X-ray data of the samples confirms the formation of the zinc blende structure. The quantum dots morphology regime (2.8 nm - 4.2 nm) was approved from the images of the TEM data. Linear absorption and photoluminescence spectroscopy were used to study the optoelectronic properties of the samples. The absorption peak exhibited a redshift with increasing Ni dopant concentration. The linear and nonlinear refractive indices, complex dielectric constant, and third-order nonlinear optical susceptibility were determined. The comprehensive optical characterization of the Ni doped CdSe quantum dots demonstrated controlled modification of their linear and nonlinear optical properties as well as electronic characteristics upon the variation of Ni concentrations that can be a good candidate for optoelectronic device applications. Finally, the obtained results of the optoelectronic properties of the Ni-doped CdSe quantum dots provide an insight into the effects of dopant levels on the fundamental light-matter interactions in these semiconductor nanocrystals. |
| Keywords |
| Optoelectronic, Co-precipitation, quantum dots, (XRD), (TEM), photoluminescence spectroscopy, refractive indices, complex dielectric constant, and third-order nonlinear optical susceptibility |
| Status: Abstract Accepted (Poster Presentation) |