Microstructural and optical properties of SiO2 glasses doped with ZnSe quantum dots and Nd3+ ions

Abstract SiO 2 glasses doped with ZnSe quantum dots and Nd 3+ ions with compositions of (1% ZnSe–99% SiO 2 ), (2% ZnSe–98% SiO 2 ) and (2% ZnSe–97% SiO 2 –1% Nd 3+ ) were synthesized by sol-gel method and then annealed at 683 K and 873 K for one hour. X-Ray diffraction (XRD) technique was used to identify the crystalline phases of ZnSe quantum dots. It was observed that 0–1 mol% of Nd 2 O 3 addition produced single phase structure in XRD. The average crystallite sizes of ZnSe quantum dots were determined using Scherrer's equation and the FW 1 5 / 4 5 M method. The size of the nanoparticles was found to be in the range of 4–10 nm. It was shown that the presence of Nd 3+ ions led to smaller quantum dot sizes and a narrow size distribution.