Related Experiment Video
Updated: Jun 14, 2026

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
Study on luminescence properties of Eu2+ in BaAl12O19 matrix
Linjiu Xiao1, Mingrui He, Yanwen Tian
1Shenyang Institute of Chemical Technology, Shenyang 110142, PR China.
Abstract:
Eu(2+)-doped BaAl12O19 phosphors were prepared using the sol-gel method, and their structure and luminescence properties were characterized by X-ray diffraction (XRD) analysis and fluorescence spectrometry. The results showed that a single hexagonal BaAl12O19 crystal structure was synthesized and the emission spectrum of BaAl12O19:Eu exhibited a broad asymmetric band from 375 to 600 nm, which was composed of three emission peaks at 438, 462, and 511 nm. The effects of crystallization temperature, Eu2+ concentration, and Al3+ content on the occupation of Eu2+ in three crystallographic positions were investigated. The emission intensity of 438 nm increased with increasing crystallization temperature, while the emission intensity of 462 and 511 nm increased with the increase of Eu2+ concentration and Al3+ content.
Related Concept Videos
Photoluminescence: Applications
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Variables Affecting Phosphorescence and Fluorescence
Atomic Fluorescence Spectroscopy
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.

