Warm white broadband emission and tunable long lifetimes in Yb3+ doped Gd2O3 nanoparticles

Gd2O3:Er3+,Yb3+ Upconversion Nanoparticle-Based Thermometry for Temperature Monitoring

“…Er 3+ ions, as one of the most typical lanthanide ions, gain significant attention owing to their appropriate energy spacing (700–800 cm –1 ) of thermally coupled level (TCL) pair ( 2 H 11/2 and 4 S 3/2 levels). To date, Yb 3+ /Er 3+ -doped upconversion (UC) luminescence materials including fluorides, oxyfluorides, oxysulfides, as well as oxides are particularly favored in FIR-based temperature detection. − Among them, gadolinium oxides are considered as the suitable luminescent host matrix for rare earth doping and temperature detection due to their good thermal conductivity and excellent thermal, mechanical, and chemical stabilities. − Thus, Yb 3+ /Er 3+ -doped Gd 2 O 3 upconversion luminescence material will be a promising candidate for luminescence thermometry.…”

White Light Emitting Gadolinium Oxide Nanoclusters for In‐vitro Bio‐imaging

“…The broad spectrum yielded a color chromaticity index coordinate of (0.33, 0.37), which can be attributed to pure white light (Commission Internationale de l′Elcairage (CIE)–0.33,0.33) [19,48] (Figure 2, b). It is important to note that, so far, most of the known routes have adopted two methods: (i) optimized mixing of red, green, and blue light‐emitting dye together to obtain WLE material, [49] and (ii) doping of rare earth metals like Er 3+ and Yb 3+ to different hosts using the different synthetic methods [50,51] . However, the current study has employed a simple, affordable, non‐toxic, green synthetic route to obtain WLE from a single material, a unique feature.…”

“…It is important to note that, so far, most of the known routes have adopted two methods: (i) optimized mixing of red, green, and blue light-emitting dye together to obtain WLE material, [49] and (ii) doping of rare earth metals like Er 3 + and Yb 3 + to different hosts using the different synthetic methods. [50,51] However, the current study has employed a simple, affordable, non-toxic, green synthetic route to obtain WLE from a single material, a unique feature. Although, the nature of the luminescence emission by nanoclusters is still evolving.…”

A Comparative Study of SiO2:Tb3+@Gd2O3:Eu3+ and Its Inverted Tb3+-Eu3+ Core–Shell Phosphors

“…Core–shell structural materials have attracted great attention due to their unique structure and amazing chemical properties. − Spherical core–shell phosphor shows superior performance and expands potential applications when compared to other morphology of phosphors. − As is known, SiO 2 is a kind of good core material because of its spherical morphology, good dispersion, controllable size, low price, stable physical and chemical properties, high biological compatibility, and optical transparency. − Meanwhile, gadolinium oxides (Gd 2 O 3 ) are proven as an outstanding luminescent host for doping rare earth owing to their excellent thermal, mechanical, and chemical stabilities. − Therefore, SiO 2 @Gd 2 O 3 :Ln 3+ has been reported and demonstrated for its potential applications in anticancer drug delivery, multicolor displays, and light-emitting diodes. − …”