LUMINESCENCE PROPERTIES OF EUROPIUM ION DOPED BARIUM BOROPHOSPHATE PHOSPHOR

摘要

A series of BaBPO_5 phosphors doped with different concentration of Eu~(2+) ions were synthesized by solid state reaction method. The reduction of Eu~(3+) to Eu~(2+) ions were obtained by heating in pure argon atmosphere. The structural properties were analyzed by using X-ray diffraction (XRD). Luminescence properties were measured at room temperature using photoluminescence (PL) spectroscopy and the effects of europium ion in the phosphor were investigated. The XRD results showed that crystal structure of the phosphor is hexagonal single phases. The addition of europium ions exhibit a broad emission band in the violet region peaking at 383 nm corresponding to transition of configuration state 4f~6 5d → 4f~7 (~8S_(7/2)) of Eu~(2+) ions. The emission intensity is affected by the concentration of Eu~(2+). The optimum intensity is observed for 0.2 mol % of Eu~(2+) ion. The occurrence of emission lines in violet region indicates that this phosphor has potential in solid-state lighting application.