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A Narrow Band Blue Phosphor NaBaAlBOCl:Eu for White Light Emitting Diodes

Overview
Journal Dalton Trans
Specialty Chemistry
Date 2025 Jan 6
PMID 39760324
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Abstract

Exploring new photoexcited phosphors has attracted attention for improving the performance of white LEDs. Here, an NaBaAlBOCl:Eu phosphor with high color purity (94.11%) has been synthesized. The NBAC:0.035Eu phosphor exhibits excellent color stability when the temperature increases from 298 K to 473 K. Impressively, the NBAC:0.035Eu blue phosphor still exhibits excellent chemical stability after being immersed in water for 25 days. In addition, Eu ions preferentially occupy the Na/Ba sites of the host structure, which contributes to the superior photoluminescence performance. Furthermore, near-ultraviolet (n-UV) pumped phosphor-converted white light-emitting diodes (pc-WLEDs) have been fabricated using the NBAC:0.035Eu blue phosphor, green commercial phosphor (Sr,Ba)SiO:Eu and red commercial phosphor (Ca,Sr)AlSiN:Eu. The resulting device shows uniformly distributed warm white light with a color-rendering index () of 89.2 and a low correlated color temperature (CCT) of 4153 K. A series of excellent characteristics of NBAC:0.035Eu, including high-performance optical characteristics, a simple synthesis process and low economic cost, support its great application potential for use in warm white LED lighting systems.