Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (8): 847-856.DOI: 10.15541/jim20190554

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Advance in Red-emitting Mn4+-activated Oxyfluoride Phosphors

JI Haipeng1(),ZHANG Zongtao1,XU Jian2,TANABE Setsuhisa2,CHEN Deliang1(),XIE Rongjun3()   

  1. 1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
    2. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
    3. School of Materials, Xiamen University, Xiamen 361000, China
  • Received:2019-10-31 Revised:2019-11-20 Online:2020-08-20 Published:2020-03-06
  • Contact: CHEN Deliang,XIE Rongjun
  • Supported by:
    National Natural Science Foundation of China(51902291);Postdoctoral Research Sponsorship in Henan Province(19030025);China Postdoctoral Science Foundation(2019M662524)

Abstract:

The stable and reliable red phosphor with high-photon energy emission (620-650 nm) is critical for the fabrication of the phosphor-converted white light-emitting diode (WLED) with low correlated color temperature and high color rendering index. Mn 4+-activated phosphor is an emerging kind of red-emitting phosphor for WLED. Herein, the energy levels transition and photoluminescence characteristics of the Mn 4+ ion were introduced; then, the preparation, crystal structure and luminescent properties of as-far reported seven kinds of Mn 4+-doped oxyfluoride red phosphors (such as Na2WO2F4:Mn 4+) containing d 0, d 10 or s 0 cations were reviewed. Currently, only in quite rare case of oxyfluoride, Mn 4+ was found to exhibit strong R-line emission, with local coordination remaining as either [MnF6] or [MnO6]. The studies on the chemical stability and quantum efficiency of Mn 4+-doped oxyfluoride phosphors are still insufficient. Finally, we prospected the future development of Mn 4+-doped oxyfluoride phosphor.

Key words: white LED, phosphor, Mn4+, oxyfluoride, review

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