BaZnLa_2O_5:Ho~(3+)-Yb~(3+) phosphor for display and security ink application

摘要

The formation of single-phase, morphological information and the impurities present in the developed phosphor has been identified by using x-ray diffraction, scanning electron microscope, and Fourier transforminfrared analysis. Nontunable intense green upconversion emission from single-phase tetragonal Ho~(3+)-Yb~(3+)-codoped BaZnLa2O5 phosphor upon 980 nm excitation has been reported. The effect of codoping with Yb~(3+) ions on the upconversion emission bands in BaZnLa_2O_5:Ho~(3+) phosphor has been discussed, and the possible upconversion mechanisms involved have been explained. The experimental results confirm the suitability of the developed phosphor in display devices and security applications.