The synthesis and properties of Ca₃Sc₂Si₃O₁₂:Ce³⁺ (CSSG) phosphor are utilized for the development of human‐centric lighting light‐emitting diodes (HCL‐LEDs)

In this study, cerium ion (Ce 3+ )‐doped calcium scandium silicate garnet (Ca 3 Sc 2 Si 3 O 12 , abbreviated CSSG) phosphors were successfully synthesized using the sol–gel method. The crystal phase, morphology, and photoluminescence properties of the synthesized phosphors were thoroughly investigated. Under excitation by a blue light‐emitting diode (LED) chip (450 nm), the CSSG phosphor displayed a wide emission spectrum spanning from green to yellow. Remarkably, the material exhibited exceptional thermal stability, with an emissivity ratio at 150°C to that at 25°C reaching approximately 85%. Additionally, the material showcased impressive optical performance when tested with a blue LED chip, including a color rendering index (CRI) exceeding 90, an R9 value surpassing 50, and a biological impact ratio (M/P) above 0.6. These noteworthy findings underscore the potential applications of CSSG as a white light‐converting phosphor, particularly in the realm of human‐centered lighting.