A novel n-UV convertible colour-tunable emitting oxynitride phosphor: Realization based on Ce³⁺ -Tb³⁺ energy transfer

In the present work, a novel n-UV convertible colour-tunable emitting phosphor was obtained based on the efficient Ce³⁺ -Tb³⁺ energy transfer in the Y₁₀ Al₂ Si₃ O₁₈ N₄ host. By properly controlling the ratio of Ce³⁺ /Tb³⁺ , the colour hue of the obtained powder covered the blue and green regions, under excitation of 365 nm. The steady-state and dynamic-state luminescence measurement was performed to shed light on the related mechanism, which was justified by the electronic dipole-quadrupole dominating the related energy transfer process. Preliminary studies showed that Y₁₀ Al₂ Si₃ O₁₈ N₄ :Ce³⁺ ,Tb³⁺ can be promising as an inorganic phosphor for white LED applications.