Abstract

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 transform infrared analysis. Nontunable intense green upconversion emission from single-phase tetragonal ${\mathrm{Ho}}^{3+}\text{-}{\mathrm{Yb}}^{3+}$-codoped ${\mathrm{BaZnLa}}_2{\mathrm{O}}_5$ phosphor upon 980 nm excitation has been reported. The effect of codoping with ${\mathrm{Yb}}^{3+}$ ions on the upconversion emission bands in ${\mathrm{BaZnLa}}_2{\mathrm{O}}_5\text{:}{\mathrm{Ho}}^{3+}$ 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.

© 2014 Optical Society of America

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