Development of sodium-zinc phosphate glasses doped with Dy3+, Eu3+ and Dy3+/Eu3+ for yellow laser medium, reddish-orange and white phosphor applications

Mn2+-Based narrow-band green-emitting Cs3MnBr5 phosphor and the performance optimization by Zn2+ alloying

“…The CIE diagram is encircled by monochromatic color coordinates from 380 to 700 nm. The color purity of a specific color is defined by the percentage of the linear distance between the chromaticity coordinates of the sample emission and the CIE1931 standard source to the linear distance between the chromaticity coordinates of the monochromatic light source and the standard source, which can be calculated by the following equation: 22 (2) = Table 1 The comparisons of fluorescence lifetime of green phosphors and luminous efficiency of WLED devices tetrahedrons are separated each other. Moreover, the fluorescence lifetimes of Mn 2+ is only two orders of magnitude difference from that of the Eu 2+ -doped green phosphors.…”

Li2O–Al2O3–ZnO–P2O5:Dy3+/Sm3+/Eu3+ glasses for solid-state yellow laser and color tunable phosphor applications

“…Photoluminescence spectra and lifetime data were obtained by means of a Horiba Jobin-Yvon Fluorolog 3-22 spectrofluorometer equipped with two Xe lamps, one of cw and the other one pulsed. Operation details of the spectrofluorometer have been described elsewhere [9].…”

“…7 F 2 hypersensitive electric dipole emission is significantly more intense than the (* 591 nm) 5 D 0 ? 7 F 1 insensitive magnetic dipole emission [9]. Similarly, orange phosphors can be achieved in Sm 3?…”

“…Metal oxide glasses have demonstrated to be excellent hosts for rare-earth trivalent (RE 3? ) ions because of their isotropic refractive index, high optical transparency, and quite easier to manufacture them than metal oxide crystals [8]. Among metal oxide glasses, phosphates activated with RE 3? ions can be employed as luminescent glasses to be coupled to NUV LEDs for application in W-LEDs, because of their efficient NUV excitation and low melting temperature [9]. Among RE 3? ions, Dy 3? ions have demonstrated to be good NUV radiation sensitizers to activator ions, among them, Sm 3?…”

In‐air self‐reduction synthesis and luminescence properties from Mg21Ca4Na4(PO4)18:Eu2+–Eu3+ excited using ultraviolet light

“…[1][2][3][4] As a common luminescence centre, rare earth ions are doped into substrates and excited using ultraviolet (UV) light to produce transition, therefore emitting light of different colours and heat. [5,6] Among these ions, europium (Eu) is favoured by researchers because of its two different valence states. [7][8][9][10] The luminescence of divalent Eu 2+ ions is greatly influenced by its crystalline environment, unlike Eu 3+ , which has a stable red light emission in different substrates, so the luminescence of divalent Eu 2+ is very colourful and tunable.…”