Accessing deep-red emission using chemical units cosubstituted LaTiSbO6:Mn4+ phosphor

Red light-emitting phosphors are important to the field of plant lighting. Therefore, it is necessary to further optimize phosphor materials. Herein, we synthesized a sequence of phosphor LaTiSbO 6 :Mn 4+ (LTS:Mn 4+ ). Due to the 2 E to 4 A 2 transition, LTS:Mn 4+ phosphors can emit red light in the range of 620–780 nm, with an emission peak at 687 nm. Chemical unit cosubstitution (substituting W 6+ - Al 3+ /W 6+ - Ga 3+ for Ti 4+ - Sb 5+ ) was used as a method to enhance the luminescence properties of LTS:Mn 4+ . When the substitution ratio of W 6+ - Ga 3+ and W 6+ - Al 3+ reached 0.1% and 0.75%, respectively, the luminescence intensity increased to 204% and 182%. Using the LTS:Mn 4+ , W 6+ , Ga 3+ phosphor and a 470 nm blue chip to fabricate a pc-LED device, the electroluminescence (EL) spectrum is well matched with the phytochrome absorption range. Therefore, the LTS:Mn 4+ phosphor will be very promising for plant growth.