Spectroscopic and dielectric properties of hydrothermally synthesized Europium-doped CdSe nanoparticles

In the present work Cadmium Selenide (CdSe) and Eu-doped CdSe nanostructures were synthesized by using hydrothermal route. The average crystallite size revealed by powder X-ray studies was found to increase for Eu-doped nanostructures. Morphology study of the Eu-doped CdSe was performed on FESEM and HRTEM. SAED pattern unveiled the crystalline nature of CdSe nanoparticles. UV–Vis absorption studies for the optical band gap was found to be 1.83 eV for CdSe nanoparticles and for Eu3+-doped CdSe it was 1.81 and 1.79 eV, respectively. XPS spectra revealed the presence of prominent cadmium, selenium, and europium peaks for different energy bands. Temperature- and frequency-dependent dielectric studies were performed for the nanostructures. It was observed that ac conductivity increases with the increase in temperature.