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.

Perspectives

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.

Read Publication

http://dx.doi.org/10.1016/j.materresbull.2014.08.055

The following have contributed to this page: Professor Lei Chen