Photoluminescence Properties of Mn4+, Cr3+ co-doped BaMgAl10O17 Phosphor

Mn4+, Cr3+ single-doped and Mn4+, Cr3+ co-doped BaMgAl10O17 phosphors were synthesized via a conventional high-temperature solid-state reaction method. Both Mn4+ and Cr3+ ions show broad excitation band extending from ultraviolet to visible light range, and the emission band peaks at 660 nm for Mn4+ ion and at 694 nm for Cr3+ ion. The relative intensity of the luminescence of Mn4+ and Cr3+ can be adjusted by changing the co-doped Cr3+ or Mn4+ concentration in the Mn4+, Cr3+ co-doped BaMgAl10O17 phosphor to better match the required light for photosynthesis of different plants. Moreover, the specific relationship between the luminous intensity ratio of Mn4+ and Cr3+ and the excitation wavelength in the region of 320 to 530 nm in the co-doped phosphor suggests that the excitation wavelength can be known by measuring the emission integral intensity ratio between Mn4+ and Cr3+. The results show that the Mn4+, Cr3+ co-doped BaMgAl10O17 phosphors can not only be used as plant growth spectral converter, but also wavelength detector.