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

Novel deep red-emitting Ca 3 Al 4 ZnO 10 :Mn 4+ (CAZO:Mn 4+ ) 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:Mn 4+ phosphor with excitation 330 and 465 nm exhibits strong deep red emission in the range of 650–790 nm. CAZO:Mn 4+ phosphor can be efficiently excited by near-ultraviolet and blue light from 300 to 500 nm. The optimal Mn 4+ ion concentration in CAZO:Mn 4+ phosphor is ∼0.6 mol%. Lifetimes of CAZO:xMn 4+ (0.3 ≤ x ≤ 1.8 mol%) phosphors decrease from 1.95 to 1.56 ms with increasing Mn 4+ ion concentration in the range of 0.3–1.8 mol%. The paper content is help to develop other Mn 4+ ion doped luminescence materials.