The development of extra-broadband visible emission phosphors is crucial to achieve next-generation illumination with better color experience. Herein, a defect engineering strategy mediated by the structural cationic substitution is proposed and experimentally demonstrated for specific ultra-broadband emission in a garnet phosphor. The induced oxygen vacancies and interstitial cation through lattice distortion break the periodic potential field of the crystal and provide electronic levels in the band gap. As a result, excited by blue-light-emitting diodes, the novel Y₃Sc₂Al₃O₁₂:B³⁺ shows an ultra-broad emission with a full width at half maximum (FWHM) of ∼170 nm. Compared to general defect-emitting phosphors, the unique Y₃Sc₂Al₃O₁₂:B³⁺ exhibits excellent thermal quenching resistance and superior internal quantum efficiency of up to 95%. These findings not only show great promise of Y₃Sc₂Al₃O₁₂:B³⁺ as an extra-broadband emitter but also provide a new design strategy to achieve a full-visible-spectrum phosphor in a single-component material for white-light applications.

中文翻译：

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一种用于高效单组分 pc-WLED 的新型超宽带可见光发光石榴石荧光粉


超宽带可见光发射荧光粉的开发对于实现具有更好色彩体验的下一代照明至关重要。在此，提出了一种由结构阳离子取代介导的缺陷工程策略，并针对石榴石荧光粉中的特定超宽带发射进行了实验验证。通过晶格畸变诱导的氧空位和间隙阳离子打破了晶体的周期性势场，并在带隙中提供电子能级。因此，在蓝光发射二极管的激发下，新颖的 Y₃Sc₂Al₃O₁₂：B³⁺ 显示出超宽发射，半峰全宽 （FWHM） 为 ∼170 nm。与一般的缺陷发射荧光粉相比，独特的 Y₃Sc₂Al₃O₁₂：B³⁺ 表现出优异的热淬火性和高达 95% 的卓越内部量子效率。这些发现不仅显示了 Y₃Sc₂Al₃O₁₂：B³⁺ 作为超宽带发射器的巨大前景，而且还提供了一种新的设计策略，可以在单组分材料中实现全可见光谱荧光粉，用于白光应用。