Bright upconversion white light emission in transparent glass ceramic embedding Tm3+∕Er3+∕Yb3+:β-YF3 nanocrystals

Abstract

Intense red (Er3+:F9∕24→I15∕24, Tm3+:G41→F43), green (Er3+:H11∕22, S3∕24→I15∕24), and blue (Tm3+:D21→F43, G41→H63) upconversion emissions were simultaneously generated in the transparent glass ceramics containing Tm3+∕Er3+∕Yb3+:β-YF3 nanocrystals under single 976nm laser excitation. It was demonstrated that Tm3+ behaves as the sensitizer for red luminescence of Er3+ and Er3+ as the quenching center for blue, red, and near-infrared upconversion emissions of Tm3+. Various colors of the luminescence, including perfect and bright white light with CIE-X=0.310 and CIE-Y=0.358, can be easily tuned by adjusting the concentrations of the rare earth ions in the material.

White upconversion luminescence in nanocrystalline (Ho,Tm,Yb):KLu(WO4)2 phosphor

“…[1]. One of the possible ways for generating white light is the energy transfer upconversion (UC) process in which low energy near infrared radiation is converted to higher energies such as visible or UV radiation.…”

White-light upconversion emission of lanthanide double-doped oxide nanoparticles via defect state luminescence of ZnO

“…It is well-known that the efficiency of a white UCL depends on the concentrations of Ln 3+ ions [35]. Here, for the first time, a white UCL is obtained through the double doping of Ln 3+ ions into the ZnO SNCs.…”

“…In our previous studies, we showed that the reaction time and temperature, the size of the samples, and the concentration of the doping ions affect the UCL properties of Yb/Tm/ZnO nanoparticles [30][31][32][33][34][35][36]. In order to analyze the functional dependence of the morphology, three sets of samples were prepared with different concentrations of OH .…”

Advances in Rare Earth Spectroscopy and Applications

“…Park et al 97 reported bright green emission in (Ba 1 572 nm. 106 White light was also simulated by RGB color mixing in TmErYb, 107 TmHoYb, 108 PrErYb (Fig. 4).…”