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

  • Lei Chen, Shaochan Xue, Xiuling Chen, Ali Bahader, Xiaorong Deng, Erlong Zhao, Yang Jiang, Shifu Chen, Ting-Shan Chan, Zhi Zhao, Wenhua Zhang
  • Materials Research Bulletin, December 2014, Elsevier
  • DOI: 10.1016/j.materresbull.2014.08.055

It were optimized for application in white light-emitting diodes.

What is it about?

The synthesis and component of red phosphor, Sr4Al14O25: Mn, were optimized for application in white light-emitting diodes.

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.


Professor Lei Chen
Hefei University of Technology

The mechanism of energy transfer is mainly through dipole–dipole interaction, revealed by the analyses of critical distance and concentration quench.

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The following have contributed to this page: Professor Lei Chen