Highly efficient cyan‐emitting phosphor materials are indispensable for closing the cyan gap in spectra of the traditional phosphor‐converted white light‐emitting diodes (WLEDs) to achieve high‐quality full‐spectrum white lighting. In this work, bright cyan‐emitting Ca₃Ga₄O₉ (CGO):0.02Bi³⁺,0.07Zn²⁺ phosphor is developed to bridge the cyan gap. Such a Bi³⁺,Zn²⁺ codoping enhances the cyan emission of CGO:0.02Bi³⁺ by 4.1 times due to the influence of morphology and size of phosphor particles, charge compensation and lattice distortion. Interestingly, codoping La³⁺ ions into the current system can achieve a photoluminescence tuning of CGO:0.02Bi³⁺ from cyan to yellowish‐green by crystallographic site engineering. Besides, Bi³⁺–Eu³⁺ energy transfer is successfully realized in CGO:0.02Bi³⁺,0.07Zn²⁺,nEu³⁺ phosphors and the emission color tuning from cyan to orange is observed. The investigation of thermal quenching behaviors reveals that the incorporation of Zn²⁺ and La³⁺ improves the thermal stability of CGO:0.02Bi³⁺. Finally, CGO:0.02Bi³⁺,0.07Zn²⁺,0.10Eu³⁺ phosphor is employed to obtain a single‐phased warm WLED device. A full‐spectrum WLED device with remarkable color rendering index (Ra) of 97.4 and high luminous efficiency of 69.72 lm W⁻¹ is generated by utilizing CGO:0.02Bi³⁺,0.07Zn²⁺ phosphor. This result suggests the important effect of CGO:0.02Bi³⁺,0.07Zn²⁺ phosphor on closing the cyan gap, providing new insights of cyan‐emitting phosphors applied in full‐spectrum white lighting.

中文翻译：

---

Ca3Ga4O9：Bi3 +的增强的蓝绿色发射和光学调谐，用于高质量的全光谱白光发光二极管

高效的发蓝光磷光体材料对于弥合传统的磷光转换白光发光二极管（WLED）光谱中的青色间隙，以实现高质量的全光谱白光照明而言必不可少。在这项工作中，开发了发出蓝光的亮Ca ₃ Ga ₄ O ₉（CGO）：0.02Bi ³⁺，0.07Zn ²⁺荧光粉来弥合青色间隙。由于磷光体颗粒的形态和尺寸，电荷补偿和晶格畸变的影响，这样的Bi ³⁺，Zn ²⁺共掺杂使CGO：0.02Bi ³⁺的蓝光发射提高了4.1倍。有趣的是，共掺杂La ³⁺通过晶体学现场工程，将离子注入当前系统可以实现CGO：0.02Bi ³⁺从青色到黄绿色的光致发光调谐。此外，在CGO：0.02Bi ³⁺，0.07Zn 2 ⁺，n Eu ³⁺荧光粉中成功实现了Bi ³⁺ -Eu ^3+的能量转移，并观察到了从青色到橙色的发射颜色调谐。热猝灭行为的研究表明，Zn ²⁺和La ³⁺的掺入提高了CGO：0.02Bi ³⁺的热稳定性。最后，CGO：0.02Bi ³⁺，0.07Zn 2 ⁺，0.10Eu ³⁺磷光体用于获得单相暖WLED器件。利用CGO：0.02Bi ³⁺，0.07Zn ²⁺荧光粉可产生具有97.4的显着显色指数（Ra）和69.72 lm W ^-1的高发光效率的全光谱WLED器件。该结果表明CGO：0.02Bi ³⁺，0.07Zn ²⁺磷光体对缩小青色间隙具有重要作用，为全光谱白光照明中使用的发蓝光磷光体提供了新的见解。