An efficient blue-violet phosphor: an advanced material designed for high-quality full-spectrum lighting.

A highly efficient phosphor with exceptional luminescence properties is crucial for achieving high-quality solid-state white-light illumination. Here, this paper presents a groundbreaking discovery, an innovative blue-violet emitting Ba 1.31 Sr 3.69 (BO 3 ) 3 Cl:Ce 3+ (BSBCl:Ce 3+ ) phosphor designed with remarkable thermal stability and quantum efficiency for full spectrum white light-emitting diodes (WLEDs). By employing a high-temperature solid-phase method, we synthesized various BSBCl: x Ce 3+ phosphors with different Ce 3+ doping concentrations. Remarkably, BSBCl:0.03Ce 3+ displays a broad excitation band from 250 nm to 400 nm, rendering it compatible with commercial near-ultraviolet (UV) LED chips. Under 330 nm excitation, this phosphor emits blue light with an astonishing 88.2% internal quantum efficiency (IQE) and an impressive 60.9% external quantum efficiency (EQE). Notably, when employed in the temperature range of 298-473 K, the synthesized BSBCl:0.03Ce 3+ phosphor exhibits exceptional color stability and thermal stability ( I 423 K / I 298 K = 83%). Utilizing BSBCl:0.03Ce 3+ as the blue-violet emitting component in the fabrication of WLED devices has demonstrated significant advancements in the color rendering index. These findings underscore the potential of BSBCl:Ce 3+ phosphors for a wide range of applications in health-oriented indoor illumination.