Tuning the luminescence properties of blue and far‐red dual emitting Gd <sub>2</sub> MgTiO <sub>6</sub> : Bi <sup>3+</sup> , Cr <sup>3+</sup> phosphor for LED plant lamp
Peixin Gao, Zeyun Zhou, Zeyun Zhou, Peng Dong, Qian Li, Honghui Li, Jing Wang, Zhi Zhou, Zhi Zhou, Mao Xia
Abstract
Abstract Blue and far‐red light play a key role in plant growth, so it is necessary to develop blue and far‐red dual emitting phosphors. However, the match between phosphors and plant pigments is not satisfactory. In this work, we synthesized a series of blue and far‐red dual emission Gd 2 MgTiO 6 : Bi 3+ , Cr 3+ (GMTO: Bi 3+ , Cr 3+ ) phosphors and discussed the luminescence performance. The blue emission at 430 nm is ascribed to 3 P 1 → 1 S 0 transition of Bi 3+ and the far‐red emission is ascribed to 4 T 2 → 4 A 2 and 2 E → 4 A 2 transitions of Cr 3+ . Notably, because of the energy competition between Cr 3+ ions and host materials, the luminescence tuning realized with the content of Cr 3+ doping. In addition, an energy‐transfer performance occurred from Bi 3+ ions to Cr 3+ ions and the photoluminescence intensity of Cr 3+ can be enhanced by Bi 3+ . The pc‐LEDs devices were synthesized by GMTO: Bi 3+ , Cr 3+ phosphor, and ultraviolet (UV) chips. Finally, the emission of GMTO: Bi 3+ , Cr 3+ phosphor matched well with the absorption spectra of plant pigments which indicated the potential applications in LED plant lamp.