Synthesis and novel emission Properties of Bi 3+ doped Ca 2 BO 3 Cl Phosphor for Plant Cultivation.

In the present work, series of Bi 3+ activated Ca 2 BO 3 Cl phosphors has been synthesized via the conventional high-temperature solid-state reaction method. The crystal structure of prepared sample was determined to be monoclinic with space group P21/c. The SEM analysis exhibits the surface morphology with aggregated particle size in nano-range. The existence of vibrational features and luminescence characteristics were studied from Fourier transform infrared spectroscopy (FTIR) and Photoluminescence (PL) techniques respectively. Under the excitation wavelength of 486nm, the PL spectrum revealed sharp emission centered at 732 nm attributes to 3 P 1 → 1 S 0 transition of Bi 3+ . The emission spectra exhibit highest emission intensity at 0.5 mol% Bi 3+ ions concentration, beyond this the emission intensity decreases owing to concentration quenching phenomenon ascribe to multipolar interaction. The CIE coordinates located at (0.7347,0.2653) confirm emission in the deep-red region with the color purity of 99.98%. The obtained outcomes suggested that reported material may be a promising candidate as red-emitting phosphor for w-LED and plant growth application.