Recent advances in Bi3+-activated narrow-band emitting phosphors for backlight display applications

The development of novel narrow-band emitting phosphors with high efficiency and stability is of great significance for WLED backlights. In recent years, the research on Bi³⁺-activated narrow-band emitting phosphors has gained significant attention for developing novel phosphors for WLED backlight applications. This Frontiers article presents recent advances in Bi³⁺-activated narrow-band emitting phosphors, encompassing their coordination environment and photoluminescence properties. The latest advancements in Bi³⁺-activated narrow-band emitting phosphors are categorized into four types based on host materials: germanate, silicate, borate, and other hosts. Additionally, detailed discussions are provided on the challenges associated with developing novel Bi³⁺-activated narrow-band emitting phosphors and potential research directions for future work. Overall, the Bi³⁺-activated narrow-band emitting phosphors have demonstrated great potential for WLED backlights; however, significant efforts are still required to enhance their comprehensive performance in order to meet practical application requirements.