Ecofriendly synthesis and white light-emitting properties of BaLa2ZnO5:Dy3+ nanomaterials for lighting application in NUV-WLEDs and solar cells

Synthesis, photoluminescence, Judd–Ofelt analysis, and thermal stability studies of Dy3+-doped BaLa2ZnO5 phosphors for solid-state lighting applications

“…For the optimal doping concentration, these coordinates approximately match the National TV Standards Committee (NTSC) standards ( x = 0.333, y = 0.0333) and are in accord with the available literature. 8,19,32 These findings suggest that the as-synthesized phosphor materials can be suitable for the generation of UV-excited warm white light emission.…”

“…Furthermore, other options for the replacement of Ba 2+ and Zn 2+ ions by the dopant Dy 3+ ions are ruled out due to dissimilarity in their ionic radii and charges, which results in considerable percentage radii differences. 32 …”

“…Among the different peaks, two prominent peaks at 367.46 nm and 453.96 nm correspond to the 6 H 15/2 → 6 P 3/2,5/2 transitions of Dy 3+ -ions, respectively. 32 The existence of weak peaks in the reflectance spectra highlights the practical application of the synthesized phosphor material for wLEDs.…”

“…Therefore, the measured value of s was found to be 3.27, which suggests the only option for the energy transfer and subsequent CQ phenomenon is the occurrence of some exchange-type interaction within the synthesized phosphor. 32 As the concentration of Dy 3+ ions exceeds its optimum values, the space between the activator ions starts decreasing, which results in the initiation of some non-radiative exchange-type of interactions. As a result, a decrease in emission intensity is observed.…”

“…There have been several past articles on this host, such as Song et al, 31 studied the thermometric properties of Bi 3+ /Sm 3+doped BaLa 2 ZnO 5 . Using the combustion approach, Sehrawat et al 30,32 investigated the green and white light emissions caused by the emissions of Er 3+ and Dy 3+ doping in the host. The sol-gel approach was used by Singh et al 33,34 for studying the luminescence properties of Sm 3+ and Tb 3+ doping in BaLa 2 ZnO 5 .…”