Color tunable luminescence characteristics and energy transfer analysis of Dy3+/Sm3+ co-doped multicomponent borosilicate glasses

Nonlinear optical and luminescence studies on Zinc Alumino-Boro-Silicate glasses co-doped with Dy3+ and Sm3+ ions for optical limiting and W-LEDs applications

“…Under 575 nm (figure 3 ) and 663 nm ( 6 H 11/3 ) lower levels along with two feasible Sm 3+ emissions from 4 G 5/2 intermediate level to 6 H 7/2 (599 nm) and 6 H 9/2 (646 nm) ground levels. The emission intensities of Dy 3+ peaks are observed to decrease as Sm 3+ concentrations rise [5]. With a 402 nm excitation wavelength, the Dy 3+ peak at 482 nm ( 6 H 15/2 ) decreases as the concentration of Sm 3+ rises, while the Dy 3+ peak at 575 nm suppresses and splits up (645 nm) and 6 H 11/2 (707 nm) levels.…”

“…Therefore, at ZABSDS3 (Dy0.5:Sm1.0) glass, the maximum emission is observed, after which emission intensity reduces, i.e., concentration quenching happens. The concentration quenching under the pump source of Sm 3+ (599 nm) is attributed to energy transfer between Sm 3+ ions in the intermediate and ground levels, associated to radiative reabsorption [5], [8].…”

“…Similarly, Sm 3+ rare earth features strong orange to intense red emission around 599 nm ( 6 H 7/2 ) and is doped into different glass matrices [4]. However, a co-doped study of Dy 3+ and Sm 3+ glasses gained special consideration as the colour tuneability behaviour and energy transfer mechanism between these two ions play a vital role [5]. With the available research studies on Dy 3+ -Sm 3+ co-doped glasses, it has been noted that Dy 3+ ions act as sensitizers and Sm 3+ ions act as activators.…”

Investigations on the fluorescence and radiative parameters of Sm3+ activated BaO-ZnF2-K2O-SiO2-B2O3 glass for laser applications

“…On this context, we have chosen multicomponent borosilicate glassy system (BaO-ZnF2-K2O-SiO2-B2O3 glass) as the host material in the present work because of its significant characteristics that we already reported in our previous works. Existence of ZnF2 in the glassy matrix significantly reduces the non-radiative transitions from the asprepared glassy system and which in turn boosts the radiative emission and metastable lifetime values whenever the rare earth ions are incorporated with it [4][5][6][7][8].…”

Spectroscopic investigation on the photoluminescent traits of Dy3+ activated multicomponent borosilicate glasses for W-LED applications

“…Among these, an active research is going on white light-emitting materials in order to achieve perfect white light [3,4]. Recently, researchers have paid an ample attention to the advancements in phosphor converted W-LEDs (white-light emitting diodes) because of the certain negative facets such as thermal degradation of the phosphor encapsulated polymer resin, low color rendering index, halo effect and moderately lesser life time etc [3,5,6]. To resolve these issues, glasses integrated with RE 3+ ions are regarded as a proper substitute.…”