No abstract

Sub‐micrometer‐sized chloroapatite blue phosphors are successfully synthesized from aqueous precursors using a spray pyrolysis method with a very short processing time and without any post‐heat treatments. The as‐prepared phosphors reveal high quantum efficiency in the long‐UV range (around 80% under excitation at 400 nm), spherical morphology, high crystallinity, and high color purity, showing great promise for white LED applications.

We report a KCaPOF:Eu phosphor with a new crystal structure. This phosphor has a large Stokes shift and converts near-ultraviolet light to red luminescence without absorption of other visible light. The mechanism was elucidated by applying a constrained density functional theory to the solved crystal structure.