Preparation and Optical Properties of ALF3: Cr3+ Phosphor

Abstract

Cr³⁺ doped AlF₃ phosphors were synthesized via a facile solid state reaction method. XRD results showed that the prepared samples are single-phase. In the emission spectrum of AlF₃:Cr³⁺ powders, there is one sharp line emission located at 695 nm, which is arisen from ²E→⁴A₂ transition of Cr³⁺ in AlF₃ lattice. The excitation spectrum of AlF₃:Cr³⁺ powders monitored at 695 nm emission have two excitation bands of 500~600 nm and 380~450 nm. At room temperature, the fluorescence decay of Cr³⁺ ions in AlF₃ have been measured and the fluorescence decay curve have been reported.