Synthesis and study of optical properties of a Gd-doped NaYF phosphor for phototherapy lamp application.

In recent trends, radiation falls under the narrowband ultraviolet-B region (305-315 nm) widely used in phototherapy lamp applications in the treatment of skin diseases. In this paper, we report a Gd-doped NaYF luminescent material synthesized for the first time using the low-temperature co-precipitation method. It crystallized into a face-centred cubic structure, as confirmed by X-ray diffraction characterization techniques and Rietveld refinement.

Synthesis and study of luminescence properties of a deep red-emitting phosphor K LiAlF :Mn for plant cultivation.

Light is the most important component in plant growth and development. This study synthesised a novel Mn -doped K LiAlF red-emitting phosphor using the coprecipitation method. We observed that on addition of dopant Mn ions to the host K LiAlF , its phase changed from rhombohedral to cubic due to the change in the lattice position of the atoms.