Orange up-conversion in TiO₂-ZnO composite ceramics fabricated by metal organic decomposition

Abstract

The phenomenon of photon up-conversion (UC) has attracted considerable research interest for its application to fields as diverse as bioimaging and photovoltaics. In this study, we report on the concentration dependence of Zn 2 TiO 4 :Yb 3+ , Er 3+ on UC emission. Upon investigating Mg, Ti, and Zn as potential UC host materials, we find that the combination of Ti and Zn yields the most increase in luminous efficiency. Further, as a result of varying the molar ratio, a high-intensity emission spectrum is observed for the ratios of Zn : Ti = 44 : 56 and 50 : 50. The samples prepared in this study exhibit excellent moisture resistance, and they can be utilized in solar cells and lighting equipment.

Nanoscale mapping of ZnO–TiO2 up-conversion phosphor containing Yb3+ and Er3+

“…ZnO-TiO 2 oxides are a multifunctional material that have been used in gas sensors [26] and photocatalysts [27,28]. And, we have reported that the PL intensity is increased by mixing TiO 2 and ZnO in comparison to only TiO 2 or only ZnO [29]. However, the luminescence efficiency of a metal oxide is generally lower than that of a halide.…”