Glass network engineering of yellow-emitting Ba 2 Sc 2 B 4 O 11 :Ce 3+ glass ceramics for full-spectrum lighting

Currently, a full-spectrum illumination scheme based on violet-light-excitation is proposed to meet the pursuit of high-quality and healthy lighting. Unfortunately, the most important yellow phosphors are extremely scarce owing to low absorption efficiency of violet light and low photoluminescence quantum yield (PLQY). Herein, glass network engineering of the B₂O₃-BaO-Sc₂O₃ system is developed to fabricate violet-light-excitable yellow-emitting Ba₂Sc₂B₄O₁₁(BSB):Ce³⁺ glass ceramic (GC) with a record PLQY of 95.0% and superior stability. It is evidenced that optimized [BO₃]/[BO₄] ratio modifies the glass network structure, creating favorable sites for heterogeneous nucleation during in situ glass crystallization. It promotes the formation of well-crystallized BSB nanocrystals (NCs) within glass matrix, consequently improving the optical performance of the BSB:Ce³⁺ GC composite. This enables the construction of both light emitting diode (LED) and laser diode (LD) driven full-spectrum light sources with high color rendering index (CRI) exceeding 93, ensuring superior overall color reproduction quality. This exploration in violet-light-excitable GC composite is poised to accelerate the development of ideal sun-like lighting technology.