Optical properties of Sr2La8(SiO4)6O2 doped with Ho3+ phosphor

Ho3+‐doped BaGd2ZnO5 green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

“…The emission spectra depicted in Figure 7b exhibited two sharp peaks at 545 nm (green) and 759 nm, resulting from radiative relaxation from different excited to ground states. The strong green emission band around 545 nm is the convolution of two relaxation transitions from 5 F 4 and 5 S 2 to the ground state [11]. The emission peak at 759 nm arose from the relaxation transition from the 5 F 5 excited state to the ground state.…”

“…Singh et al . [11] conducted a study on the different optical properties of Ho 3+ ‐doped Sr 2 La 8 (SiO 4 ) 6 O 2 phosphor synthesized via the sol–gel approach. Moreover, the same group investigated the green emission properties of Ho 3+ doping in LaVO 4 phosphor [14].…”

“…Saeed et al [13] reported on cathodoluminescence studies of Ho 3+ /Bi 3+ co-doped yttrium oxyfluoride, where they achieved colour tunability with the help of the co-dopant Bi 3+ . Singh et al [11] conducted a study on the different optical properties of Ho 3+ -doped Sr 2 La 8 (SiO 4 ) 6 O 2 phosphor synthesized via the sol-gel approach.…”

“…Although all RE ions exhibit strong absorption and emission spectra due to 4f-4f transitions, which are significantly influenced by 5s and 5p shells, Ho 3+ serves as an effective luminescence centre due to the abundance of metastable states that result in various spectral emission bands [10]. Ho 3+ also exhibits upconversion phenomena resulting from radiative transitions between its well separated energy levels [11]. However, to enhance their emission properties, RE ions must be integrated into an appropriate host material [5,11,12].…”

“…Ho 3+ also exhibits upconversion phenomena resulting from radiative transitions between its well separated energy levels [11]. However, to enhance their emission properties, RE ions must be integrated into an appropriate host material [5,11,12]. In this context, various RE-activated oxide-based nanophosphor materials like phosphates, aluminates, borates, zincates, and zirconates have been found effective due to their cost-effective synthesis and environmentally friendly nature.…”