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

Abstract

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 Y 3 Al 5 O 12 :Ce 3+ yellow 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. Therefore, phosphor embedded glass-ceramics have been developed as a promising way to obtain durable solid-state lighting devices. However, in these methods, there is a greater risk of reactions between the phosphor material and the glass host. At this point, lanthanide-doped luminescent glasses have drawn great attention as a new generation phosphor and/or epoxy free white-light-emitting source owing to their favorable properties including high thermal and chemical stability, high transparency, and easy manufacturing process. This review article aims to comprehensively summarize the recent progress in singly (i.e., Dy 3+ , Eu 2+ ), doubly (i.e.

Recyclability of CsPbBr3 quantum dot glass nanocomposites for their long-standing use in white LEDs

“…Photoluminescence quantum yield (PLQY) measurements, temperature-dependent PL analysis and assessment of colorimetric properties including Commission Internationale d'Eclairage (CIE) 1931 color coordinates, correlated color temperature (CCT) and color rendering index (CRI) are realized using the same procedure explained comprehensively in our previous papers. 31,34,35 Luminous efficacy values (LERs) are calculated using the following equation: 36 where ( ν ) is the eye sensitivity function and P opt ( λ ) is the spectral density.…”

Synthesis and optical properties of Gd4Al2O9:Eu3+, a red emitting phosphor with a strong negative thermal quenching effect

“…The synthesis of Eu 2+ doped (oxygenated) nitrides require harsh preparation conditions and oen suffers from blue-green light reabsorption, resulting in imbalance in color and reduced luminous efficiency. 2,3 A good quality red emitting phosphor for lamps should be able to be excited by near-UV light (370-410 nm) without reabsorption of visible light and have good chemical stability. In addition, the operating temperature of Pc-WLEDs is over 150 °C, so the ability to maintain excellent uorescence emission at operating temperature is an important indicator to evaluate the phosphor performance.…”

Distributive Nd-to-Yb Energy Transfer within Pure [YbNdYb] Heterometallic Molecules

“…[30][31] Accessing improved solar cells may be among the benefits of this phenomenon. 32 The active components leading to sensitized luminescence may be exploited in a variety of forms (glasses and ceramic materials, 33 nanoparticles, 20 polymers, 34 metalorganic frameworks, 35 etc.). In this respect, an optimal mode of implementing it is building up the antenna and the emissive centre into discrete molecules.…”