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

Mn 4+ , Cr 3+ single-doped and Mn 4+ , Cr 3+ co-doped BaMgAl 10 O 17 phosphors were synthesized via a conventional high-temperature solid-state reaction method. Both Mn 4+ and Cr 3+ ions show broad excitation band extending from ultraviolet to visible light range, and the emission band peaks at 660 nm for Mn 4+ ion and at 694 nm for Cr 3+ ion. The relative intensity of the luminescence of Mn 4+ and Cr 3+ can be adjusted by changing the co-doped Cr 3+ or Mn 4+ concentration in the Mn 4+ , Cr 3+ co-doped BaMgAl 10 O 17 phosphor to better match the required light for photosynthesis of different plants. Moreover, the specific relationship between the luminous intensity ratio of Mn 4+ and Cr 3+ 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 Mn 4+ and Cr 3+ . The results show that the Mn 4+ , Cr 3+ co-doped BaMgAl 10 O 17 phosphors can not only be used as plant growth spectral converter, but also wavelength detector.