Green-emitting YBO3:Ce3+,Tb3+ phosphor photoluminescence characteristics for close UV stimulation

Abstract

Through a solid state process, YBO<sub>3</sub>:Ce<sup>3+</sup>,Tb<sup>3+</sup> was created via rare earth oxides along with boric acid. The phosphor absorbs close-ultraviolet illumination through the transitions 4f-5d of Ce<sup>3+</sup>, then emits a wide spectrum of light through the transitions 5d-4f of Ce<sup>3+</sup> and a sharp spectrum of light through the transitions 4f-4f of Tb<sup>3+</sup>. Nonradioactive power transmission between Ce<sup>3+</sup> and Tb<sup>3+</sup> has been seen in samples with varying amounts of Ce<sup>3+</sup> and Tb<sup>3+</sup> using spectroscopic analysis. The quantities of Ce<sup>3+</sup> as well as Tb<sup>3+</sup> decides the hue for the YBO<sub>3</sub>:Ce<sup>3+</sup>,Tb<sup>3+</sup> emission, ranging between blue and green. The Y<sub>0.82</sub>Ce<sub>0.03</sub>Tb<sub>0.15</sub>BO<sub>3</sub> phosphor, which emits green light when optimized, has an exterior quantum effectiveness of 76.7% and an emission color of (0.309, 0.547). This phosphor's luminescence strength maintains 87% of its strength at ambient temperature, demonstrating enough heat stability for white illumination emitting diode implementations.