Influence of Mg on Structural and Optical Properties of ZnSe Nanocrystals Synthesized by Microwave Assisted Technique

Abstract

Abstract ZnSe is an important semiconductor material having applications in electronic and optoelectronic fields like nonlinear optics, light emitting diodes (LEDs), flat panel displays, lasers, logic gates, transistors, etc. Pure ZnSe and Mg doped ZnSe have been synthesized by microwave assisted method. In the synthesis of pure and Mg doped ZnSe nanoparticles the chemicals used were Zinc Chloride (ZnCl2), Selenium Powder, ethylenediamine and Magnesium Chloride. The synthesized nanoparticles have been characterized to investigate the morphological, structural and optical properties. The crystal structure of the nanocrystallites have been calculated by X- ray diffraction pattern and the size of the crystalliltes have been observed using Debye-Scherrer formula. The crystallite size was obtained around 6 nm for pure ZnSe and around 11 nm for Mg doped ZnSe nanocrystals. UV- Visible spectrophotometer was used for the measurement of optical bandgap. The value of bandgap was found to be 3.42 eV for ZnSe and it was 3.48 eV for Mg-doped ZnSe. The XRD spectrum also confirms the crystallinity of the samples.