Luminescence characteristics of Ca 4YO(BO 3) 3 doped with Bi 3+, Dy 3+ and Pr 3+ ions

Abstract

The photoluminescence (PL) properties of Ca 4YO(BO 3) 3 doped with Bi 3+, Dy 3+, and Pr 3+ ions were investigated. These compounds were prepared using a typical solid-state reaction. The excitation and emission spectra were measured using a spectrofluorometer. For Ca 4YO(BO 3) 3:Bi 3+, the excitation spectrum showed the bands at about 228, 309, and 370 nm which correspond to the 1S 0→ 1P 1 transition and the 1S 0→ 3P 1 transition of Bi 3+ ions. The emission band at 390 nm corresponded to the 3P 1→ 1S 0 transition of Bi 3+ ions. For Ca 4YO(BO 3) 3: Bi 3+,Dy 3+, energy transfer occurred from Bi 3+ to Dy 3+ somewhat. In Ca 4YO(BO 3) 3:Bi 3+,Dy 3+,Pr 3+, the excitation band at 367 nm was enhanced obviously due to the energy migration from Bi 3+ to Pr 3+, which converted efficiently the emission of semiconductor InGaN based light-emitting diode (LED). Therefore, the emission of Dy 3+ ions was enhanced due to the energy migration from the process of Bi 3+→Pr 3+→Dy 3+. It resulted in the good color rendering.