Near-Infrared Emitting Phosphor LaMg<sub>0.5</sub>(SnGe)<sub>0.5</sub>O<sub>3</sub>:Cr<sup>3+</sup> for Plant Growth Applications: Crystal Structure, Luminescence, and Thermal Stability
Qian Wu, Panlai Li, Zejun Ye, Xiaoxue Huo, Huifang Yang, Yu Wang, Dawei Wang, Jinxin Zhao, Zhiping Yang, Zhijun Wang
Abstract
Corresponding to the absorption curve of plant photosensitive pigment Pfr, near-infrared light has a broad application prospect in plant lighting. In order to explore this plant growth lamp, the novel near-infrared emitting phosphor LaMg0.5Sn0.5O3:Cr3+ was synthesized, which can be efficiently excited by 467 nm blue light. There are two luminescence centers, which were proven by testing the low-temperature spectrum, the excitation spectrum at different wavelengths, and the lifetime decay curve, and the two cell sequence substitution processes were obtained by Rietveld refinements of XRD. By introducing Ge4+, its luminescence intensity has been increased 1.6 times and the intensity at 150 °C remains at almost 80% that at room temperature. Finally, two different kinds of illumination experiments for plant growth were carried out, and the feasibility of the LaMg0.5(SnGe)0.5O3:Cr3+ phosphor for plant growth was confirmed.