The coupling of blue emitting carbon dots with Eu/Tb co-doped luminescent glasses for utilization in white light emitting diodes.

Lanthanide-doped luminescent glasses have attracted tremendous attention in modern optoelectronic applications, especially for solid-state white light-emitting diodes (WLEDs). Eu/Tb co-doped luminescent glasses are well-known to emit intense yellowish-orange light resulting from the energy transfer from green-emitting sensitizer Tb ions to red-emitting activator Eu ions. Obtaining highly efficient blue light from lanthanide ions remains a challenge due to their weak down-converted emission.

Color tunable emission from Eu and Tm co-doped CsPbBr quantum dot glass nanocomposites.

Cesium lead bromide (CsPbBr) quantum dots (QDs) have shown great potential in the field of luminescent materials owing to their superior optical and electrical properties. However, instability and lack of multicolor emissions resulting from the intrinsic nature of CsPbBr QDs are still the major challenge for their commercialization. Herein, Eu and Tm co-doped CsPbBr QD glass nanocomposites (GNCs) are successfully synthesized traditional melt-quenching followed by a heat-treatment route to obtain tunable emission in a durable host material.

Recent progress in lanthanide-doped luminescent glasses for solid-state lighting applications-a review.

Nowadays, solid-state white light-emitting diodes (wLEDs) have attracted remarkable attention for applications in general lighting, displays and numerous electronical devices due to their eminent efficiency, longer lifetime and higher mechanical durability compared to traditional incandescent and fluorescent lights. In current commercial wLEDs, a combination of YAlO:Ceyellow phosphor with blue LED chip and epoxy resin is generally used to generate white light. However, there are some considerable frailties mostly originated from phosphor and resin such as, degradation upon heat, and moisture, inhomogeneous spectral distribution, and poor color rendering capability.

The synergistic effect of Er and Ho on temporal color tuning of upconversion emission in a glass host a facile excitation modulation technique for anti-counterfeiting applications.

Lanthanide-doped upconversion luminescent materials are highly promising for diverse applications, e.g., solid-state lighting, volumetric displays, and anti-counterfeiting, owing to their unique optical feature of color-tunable emission under near-infrared excitation.

Synthesis and evaluation of demethoxyviridin derivatives as potential antimicrobials.

The in vitro antibacterial and antifungal activities of demethoxyviridin and some synthetic analogues were evaluated by the agar diffusion method. The minimum inhibitory concentrations (MIC) of the active compounds were also determined by the agar dilution method. Demethoxyviridin (1) showed moderate antibacterial activity against most of the strains tested.