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ZnSe/ZnSe:Ag nanoparticles: synthesis, characterizations, optical and raman studies
Pushpendra Kumar1, Jai Singh, Koduri Ramam
1Faculty of Engineering, Department of Materials Engineering, University of Concepcion, Concepcion, 4070409, Chile.
Journal of Nanoscience and Nanotechnology
|May 8, 2013
Summary
Pure and silver-doped zinc selenide nanoparticles were synthesized and characterized. Silver doping reduced near-band-edge emission in these semiconductor nanoparticles, despite expectations.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Nanoparticles (NPs) offer high control over structural and surface properties.
- Solution-phase synthesis allows versatile engineering of nanomaterials.
- Zinc Selenide (ZnSe) is a semiconductor with tunable optical properties.
Purpose of the Study:
- Synthesize pure and silver (Ag)-doped zinc selenide nanoparticles (ZnSe NPs).
- Investigate the structural and optical properties of synthesized ZnSe NPs.
- Analyze the effect of Ag doping on the photoluminescence of ZnSe NPs.
Main Methods:
- Solution phase chemistry for NP synthesis.
- X-ray Diffraction (XRD) for structural analysis.
- UV-Visible spectroscopy, photoluminescence (PL) spectroscopy, Transmission Electron Microscopy (TEM), High Resolution TEM (HRTEM), Energy Dispersive X-ray analysis (EDX), and Raman spectroscopy for characterization.
Main Results:
- Successfully synthesized pure and Ag-doped ZnSe NPs.
- Observed a UV emission peak at 380 nm attributed to exciton transitions.
- A blue emission band was assigned to Zn interstitial and vacancy level transitions.
- XRD confirmed Ag incorporation into the cubic ZnSe lattice.
- A decrease in near-band-edge emission was observed with Ag doping.
Conclusions:
- Ag-doped ZnSe NPs can be synthesized via solution phase chemistry.
- Ag doping influences the optical properties, specifically reducing near-band-edge emission.
- The study provides insights into the structural and optical behavior of Ag-doped ZnSe NPs for potential device applications.
