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

作者：Cho Deok Ki; Lee Sang Seok; Lim Ji Soo; Baek Seong Ho; Park Il Kyu^*

来源：Ceramics International, 2017, 43(13): 9686-9690.

DOI：10.1016/j.ceramint.2017.04.142

• ZnAI layered double hydroxide
• Eu-doping
• Photoluminescence
• Hydrothermal growth

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 10 wt%, 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 30 wt%. 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.

• 出版日期2017-9