Visible light-emission from Eu-doped ZnAl layered-double hydroxide

• Published in: Ceramics international Vol. 43; no. 13; pp. 9686 - 9690
• Main Authors: Cho, Deok-Ki, Lee, Sang-Seok, Lim, Ji-Soo, Baek, Seong-Ho, Park, Il-Kyu
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-09-2017
• Subjects: Eu-doping; Hydrothermal growth; Photoluminescence; ZnAl layered double hydroxide; Hydrothermal growth; ZnAl layered double hydroxide; Eu-doping; Photoluminescence
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2017.04.142

We report on the evolution of the emission and chemical properties of Eu-doped ZnAl-Layered double hydroxide (LDH) with variation of Eu doping concentration during the hydrothermal growth. With increasing Eu source concentration, the morphologies of the ZnAl-LDHs became denser and more closely packed while maintaining the thickness of each plate. As the Eu source concentration increased to 10wt%, specific emission from the doped Eu3+ ions was enhanced in the photoluminescence spectra. However, the peak intensity decreased when the concentration increased further to 20 and 30wt%. X-ray photoelectron spectroscopy results showed an abnormal increase of the Eu2+/Eu3+ ratio in the LDHs with increasing Eu source concentration, which suppressed the emission from the Eu3+ electronic transitions.