Significant improved quantum yields of CaAl12O19:Mn4+ red phosphor by co-doping Bi3+ and B3+ ions and dual applications for plant cultivations

The quaternary-doped phosphors CaAl12O19: Mn4+, Bi3+, Mg2+, B3+ (CAO:MMBB) were designed and synthesized. The synergetic effect of Bi3+ and B3+ leads to high quantum yields (84.9%) of deep-red emission originating from Mn4+ ion 3d3 transitions in octahedral symmetry. The fabrication of solar spectral conversion (SSC) films and plant growths (PG) LEDs added CAO:MMBB show excellent dual applications in plant cultivations.165