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

Abstract

Through a solid state process, YBO₃:Ce³⁺,Tb³⁺ was created via rare earth oxides along with boric acid. The phosphor absorbs close-ultraviolet illumination through the transitions 4f-5d of Ce³⁺, then emits a wide spectrum of light through the transitions 5d-4f of Ce³⁺ and a sharp spectrum of light through the transitions 4f-4f of Tb³⁺. Nonradioactive power transmission between Ce³⁺ and Tb³⁺ has been seen in samples with varying amounts of Ce³⁺ and Tb³⁺ using spectroscopic analysis. The quantities of Ce³⁺ as well as Tb³⁺ decides the hue for the YBO₃:Ce³⁺,Tb³⁺ emission, ranging between blue and green. The Y_0.82Ce_0.03Tb_0.15BO₃ 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.