Enhanced green luminescence in BaZn1.06Al9.94O17:Tb3+ by co-doping with Bi3+ and energy transfer from Bi3+ to Tb3+

The photoluminescence properties of the novel green phosphors BaZn1.06Al9.94O17:Tb3+,Bi3+ and energy transfer were investigated in this study. The Tb3+-doped BaZn1.06Al9.94O17 phosphors emitted green emission at 544 nm contributed by the D-5(4)-+ F-7(5) transition with the excited wavelength of 228 nm. When Bi3+ ions were co-doped into the BaZn1.06Al9.94O17:Tb3+, the absorption band was shifted to 265 nm, and the emission intensity was enhanced significantly due to the energy transfer from the Bi3+ to Tb3+ ions. The temperature-dependent emission spectra were analyzed in a range of 300-500 K. The natural logarithm value of the emission intensity at 544 nm had a good linear relationship with the temperature. The absolute sensitivity (S-a) and maximum relative sensitivity (S-r) of BaZn1.06Al9.94O17:Tb3+ co-doped with Bi3+ were 0.958 % and 0.10 % K-1, respectively. The results indicated that BaZn1.06Al9.94O17:Tb3+ green phosphors co doped with Bi3+ are potential candidates for applications.

Automated summary

The study investigated the photoluminescence properties of novel green phosphors BaZn1.06Al9.94O17:Tb3+,Bi3+ and the impact of energy transfer. The co-doping of Bi3+ ions into Tb3+-doped BaZn1.06Al9.94O17 phosphors enhanced the emission intensity significantly, showing potential application value.