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Updated: Aug 19, 2026

Phase-Dependent Control of Trap Depth and Persistent Luminescence in Strontium Aluminate Phosphors
Published on: December 5, 2025
[Influence of Pr3+ on Eu3+ luminescence in three component complex system of Eu(ClO4)3-DPSO-phen]
Wen-xian Li1, Rui-xia Zhong, Qing-shan Luo
1Department of Chemistry, Nei Mongol University, Hohhot 010021, China.
Abstract:
Different nuclear [(Eu(1 - x)Pr(x))(DPSO)(phen)3(ClO4)2]ClO4 x nH2O (x = 0.000-0.200, DPSO as the abbreviation for diphenyl sulfoxide and phen for 1,10-phenanthroline, n = 1-6) coordination compounds were synthesized, and were studied by means of composition analysis, conductance, IR spectra and fluorescence excitation and emission spectra. In the fluorescence spectra it was found that Pr3+ has a great influence on the luminescence of Eu3+. The fluorescence emission intensity of europium perchlorate was enhanced when doped with 0.001-->0.100 mol Pr3+. The local symmetry of Eu3+ site is low in this coordination compounds.
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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.

