Revealing the multicolor mechanism in borotellurite glass phosphor: From individual emission of dual-modes to WLED applications

Dy³⁺, Eu³⁺ co-doped borotellurite (HKMTZ) glasses are fabricated successfully by pressureless solid-phase reaction for potential applications in white light-emitting diodes (WLED). A novel effect of individual emission of dual-modes between Dy³⁺ and Eu³⁺ is observed firstly which reveals the multicolor mechanism that can be tuned easily from reddish-orange (2746 K) to nature-white (4588 K) to cool white (7889 K). And dual-modes emissions of Dy³⁺ and Eu³⁺ with independent light-emitting are enabled to be observed under 393 nm excitation due to the strong competition between Dy³⁺ and Eu³⁺. Moreover, replacing traditional packaging technology of LED to regard as color-converter has been come up as an efficient method to promote properties of luminescence and thermal stability. The aforesaid phenomena of photoluminescence results demonstrate that Dy³⁺, Eu³⁺ co-doped HKMTZ glass is an excellent candidate with tunable multicolor which may possess promising applications for WLED.