Preparation and upconversion luminescent properties of Yb3+/Er3+ doped transparent glass-ceramics containing CaF2 nanocrystals

Research on upconversion and temperature sensing properties of Er3+/Yb3+ codoped glass ceramics containing BaF2 crystals

“…It can be found that when the heat treatment temperature increases, the upconversion intensity first rises, then it reduces as the temperature rises further, and the sample GC600 exhibits the highest upconversion luminescence intensity; this phenomenon is explained as follows: at the beginning, as the temperature rises, the size and quantity of crystals increase, and the proportion of Er 3+ and Yb 3+ incorporated into the lattice also increases, so the upconversion luminescence is enhanced. However, with the further increase of temperature, the scattering of upconversion luminescence at the phase boundary increases, 20 or the concentration quenching occurs due to the enrichment of Er 3+ in the crystal, 21 resulting in a decrease in the intensity of upconversion luminescence. In addition, the upconversion fluorescence spectra of the glass ceramics exhibits a Stark effect at 540 nm and 650 nm that is not presented in the precursor glass, which is due to the energy level splitting phenomenon caused by the crystal field around Er 3+ .…”

Annealing-assisted optimization for persistency of afterglow of SrAl2O4:Eu2+/Dy3+ microparticles for forensic detection

“…11 This kind of photoluminescence is very useful for different applications. [12][13][14][15] Exploration of the strong long-aerglow properties of rare-earth-doped, micro-sized materials is highly signicant for new applications. With long lifetimes of luminescence or aerglow, these materials present great potential in some emerging elds, such as nanocoating of wood surfaces, painting of signboards, security, sensing, and biomedical applications, among others.…”

Transparent Glass Ceramics

“…In addition to these applications, there are many emerging applications of transparent glass ceramics, such as luminescent materials for optical and photonics use, spectral converters for solar application, solid-state light-emitting diodes, optical amplifiers for optical communication, electrochromic window, microwave absorber, etc. [8][9][10][11][12][13][14]. This demand for transparent glass ceramics is increasing with the advancement of technologies.…”