What is it about?
The synthesis and component of red phosphor, Sr4Al14O25: Mn, were optimized for application in white light-emitting diodes.
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Why is it important?
The microstructure and morphology were investigated by the X-ray diffraction and scanning electron microscopy. Different valences of Mn ions in Sr4Al14O25 were discriminated using the electron paramagnetic resonance and X-ray absorption near-edge structure spectroscopy techniques. The bond-valence theory was used to analyze the effective valences of Sr2+ and Al3+ in Sr4Al14O25.
Perspectives
The mechanism of energy transfer is mainly through dipole–dipole interaction, revealed by the analyses of critical distance and concentration quench.
Professor Lei Chen
Hefei University of Technology
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This page is a summary of: The site occupation and valence of Mn ions in the crystal lattice of Sr4Al14O25 and its deep red emission for high color-rendering white light-emitting diodes, Materials Research Bulletin, December 2014, Elsevier,
DOI: 10.1016/j.materresbull.2014.08.055.
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