The optical properties of Mg-doped ZnO quantum dots. (15th July 2022)

• Record Type: Journal Article
• Authors: Wu, Wei-Che; Juang, Yung-Der
• Is Part Of: Solid state communications. Volume 350(2022)
• Publication Date: 2022-07-15
• Subjects: Sol-gel method -- Mg-doped ZnO -- Quantum dot -- Optical properties; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2022.114791
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: This research found that ZnO doping with Mg 2+ can control its fluorescent intensity, energy gap and fluorescent wavelength. The non-high temperature manufacturing process (50 °C) can also avoid the reduction of fluorescent efficiency to a certain extent. A simple sol-gel method is used to prepare a transparent Zn1-X MgX O quantum dot solution, and the product is precipitated by a direct precipitation method. After purification, the Zn1-X MgX O quantum dot powder are obtained, which can be re-dissolved into the solution. The results show that the doping of Mg 2+ in ZnO led to the increase of fluorescent intensity and energy gap. Also, with the increase of doping ratios, the PL intensity increases and the emission bands are slightly blue-shifted. Graphical abstract: Image 1 Highlights: ˙ A simple sol-gel method is used to prepare a transparent and stable Zn1-X MgX O quantum dot solution. ˙ The doping of Mg 2+ in ZnO leads to the decrease in grain size. ˙ The doping of Mg 2+ in ZnO leads to the increase of fluorescent intensity and energy gap. Also, there is a phenomenon of blue shift observed in the fluorescent spectra.