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. [Display omitted] •Dy3+, Eu3+ doped HKMTZ glasses are fabricated by solid-phase method as WLED material.•A novel effect of individual emission of dual-phase is identified between Dy and Eu.•Multicolor regulation can be tuned from reddish-orange to nature-white to cool white.•HKMTZ glasses can emit superior white illumination under UVB and UVC excitation.•New research effect for multicolor tuning WLED provides a new dimension of thinking.