Spectroscopic properties of Ce3+ doped silicate glasses for near-UV white LEDs and blue laser applications

Using the traditional melt quenching method, a blue-emitting glass Ce³⁺-(Cao-MgO-SiO₂) was developed to be used in White light emitting diodes (W-LEDs). The FTIR and X-ray diffraction were employed to check the structure of the prepared samples. The results indicated that all of the samples were in the amorphous phase, and the tetrahedron SiO₂ is the basic building block in the glass network. The photoluminescence (PL), photoluminescence excitation (PLE), and time-resolved photoluminescence (TRPL) techniques were used to investigate the optical and spectroscopic properties of the synthesized glass. The outcomes revealed that a UV chip can efficiently stimulate the phosphor, causing it to release a powerful, broad blue spectrum with a maximum wavelength at 405 nm, Furthermore, our samples' average lifetimes are two orders of magnitude longer than those of comparable glasses, indicating that the 5d level turned to a meta-stable level. The sample with the optimum Ce³⁺ content (S0.5Ce) displayed a bright blue emission with chromaticity coordinates of (0.186, 0.096) and color purity of 89.36 %. Based on the current research, Ce³⁺-(Cao-MgO-SiO₂) glass appears to be a viable candidate for near-UV chip-based W-LEDs applications.