Photo-luminescent properties and synthesis of Ca3Al4ZnO10:Mn4+ deep red-emitting phosphor

Novel deep red-emitting Ca3Al4ZnO10:Mn4+ (CAZO:Mn4+) phosphor is synthesized by high-temperature solid-state reaction method in air. The crystal structures and optical characterizations of the phosphors are described. X-ray diffraction patterns indicate that all samples are a pure phase. CAZO:Mn4+ phosphor with excitation 330 and 465 nm exhibits strong deep red emission in the range of 650-790 nm. CAZO:Mn4+ phosphor can be efficiently excited by near-ultraviolet and blue light from 300 to 500 nm. The optimal Mn4+ ion concentration in CAZO:Mn4+ phosphor is ∼0.6 mol%. Lifetimes of CAZO:xMn4+ (0.3 ≤ x ≤ 1.8 mol%) phosphors decrease from 1.95 to 1.56 ms with increasing Mn4+ ion concentration in the range of 0.3-1.8 mol%. The paper content is help to develop other Mn4+ ion doped luminescence materials.