Investigation of Sm3+-doped PBNaG glasses for orange LED applications

Abstract

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Structural, photoluminescence, and optical characteristics of a Sm3+‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

“…Further increase in Sm 3+ ions led to a significant drop in emission intensity, displaying the lowest value for sample BPbSrSm 3.0 . This drop in intensity was due to concentration quenching [43–45]. The same results have been reported previously [44, 45].…”

“…Sm 3+ , f-f transition or f-d transitions [42]. ing [43][44][45]. The same results have been reported previously [44,45].…”

“…This drop in intensity was due to concentration quenching [43–45]. The same results have been reported previously [44, 45]. The transitions 6 H 9/2 and 6 H 11/2 were considered as electric dipoles.…”

“…The lifetime profile was fitted to a single exponential curve to estimate the decay lifetime. The single exponential form resulted from cross–relaxation among Sm 3+ ions [44]. Figure 7 shows the fitted measured time decay for sample BPbSrWSm 0.5 .…”

Spectroscopic and Radiative Properties of Sm3+ Doped Sodium-Lead-Zinc-Lithium-Borate Glasses

“…The emission peaks at 563, 599, and 645 correspond to the transition 4 G5/2 to 6 H5/2, 6 H7/2 and 6 H9/2 respectively. Among the three transitions the most intense were 4 G5/2 to 6 H7/2, which emitted orange fluorescence, while the weakest 6 G5/2 to 6 H5/2 indicated red emission [21][22]. It can be observed from FIGURE 3 that the peak intensity increases, namely the increase in Sm2O3 content up to 1 mol% and then decreases [23].…”