The influence of processing parameters on photoluminescent properties of Ba2ZnS3:Ce phosphors by double-crucible method

Computational evaluation of novel barium zinc chalcogenides Ba2ZnCh3 (Ch = S, Se, Te) for advanced optoelectronic applications

“…The e 1 (0) which is the static dielectric constant is generally specified as having a small energy limit for the e 1 (o). A larger value of e 1 (0), is observed for a small gap value in our studied materials, which verifies Penn's model, 32 as expressed using the relation e 1 (0) E 1 + (ho p /E g ) 2 , which means that larger e 1 (0) is yielded for a material with a small band gap value. This was confirmed from the computed static values e 1 (0) of 5.22 for Ba 2 ZnS 3 , 6.12 for Ba 2 ZnSe 3 , and 7.71 for Ba 2 ZnTe 3 as observed in Fig.…”

“…The calculated ground state energies for Ba 2 ZnS 3 , Ba 2 ZnSe 3 , and Ba 2 ZnTe 3 are 67.156 (a.u), 67.214 (a.u), and 67.347 (a.u), respectively. When moving from Ba 2 ZnS 3 to Ba 2 ZnTe 3 , the chalcogen radii effectively affect the lattice parameter “ c ”, and a considerably higher difference in “ c ” is concluded compared to the paramete 1–54 r “ a ”. A useful relationship was discovered between the formation energy and the degree of ionicity between the Zn–Ch bonds, which suggests that lesser formation energies, weaker would be the ionic bonds.…”

“…The Ba 2 ZnS 3 material when doped with Mn/Eu/Ce was described as different coloured phosphors having applications in the manufacturing of various types of LEDs. [31][32][33][34] Recent studies also proved that tuneable emission of Eu, and Ce doped Ba 2 ZnS 3 coupled with blue LEDs can be employed in the production of numerous white light sources. 35 Similarly, Ba 2 ZnS 3 : Eu 2+ co-doped with halide ions displayed a notable conversion of green to red light and had remarkable applications in solar energy utilization.…”

Optical properties of Ce3+-doped KLuS2 phosphor

“…The Ce-doped SrGa 2 S 4 films exhibit the characteristic photoluminescent emission occuring in the 445 nm region [23]. Green to yellowish green light emitting Ce 3 þ -doped barium zinc sulfide (Ba 2 ZnS 3 ) phosphor powders have been synthesized by a double-crucible method [24]. The photoluminescence (PL) spectra show that the emission peaks located in the 502-532 nm range (under excitation at 422 nm) and in the 530-560 nm range (under excitation at 358 nm) depend on the Ce 3 þ concentration.…”

The enhancement of photoluminescence characteristics of Eu-doped barium strontium silicate phosphor particles by co-doping materials

“…Pasting fluorescent materials over an ultraviolet (UV) LED chip is considered as the efficient process because the process can produce full color. In order to successfully apply phosphor-combined UV LED to the lighting, fluorescent materials emitting blue, green and red lights should have high efficiency under long wavelength UV [3][4][5][6][7][8][9].…”