Luminescence and spectral hole burning of Sm2+ doped in Li2O–SrO–B2O3 glass-ceramics

Luminescence properties of the Sm-doped borate glasses

“…Luminescence properties of the Sm 2+ centres in borate compounds were reported in [42][43][44]. Generally, the Sm 2+ -doped glasses can be produced in a strongly reducing Ar, H 2 or H 2 /N 2 atmospheres [45,46].…”

“…Generally, the Sm 2+ -doped glasses can be produced in a strongly reducing Ar, H 2 or H 2 /N 2 atmospheres [45,46]. The Sm 2+ ions in borate compounds created by X or γ radiations [44] are unstable that is caused by spectral hole burning [44,47]. [48].…”

Effects of Postannealing on the Photoluminescence Properties of Coprecipitated Nanocrystalline BaFCl:Sm3+

“…8 Interestingly, it was reported that the reduction of Sm 3+ to Sm 2+ in some hosts can be realized by annealing in air, in particular in many alkaline earth borate hosts, such as in BaB 8 O 13 , 9 SrB 4 O 7 , 10−12 SrB 6 O 10 , 13,14 CaSO 4 , 15 and Li 2 O-SrO-B 2 O 3 glass-ceramics. 16 In these hosts, it is believed that the rigid three-dimensional network of BO 4 tetrahedra plays an important role in the reduction of Sm 3+ ions. 12 Mikhail et al 11 proposed that the reduction of Sm 3+ to Sm 2+ ions in SrB 4 O 7 occurs via the crystallization of the host matrix during the annealing process.…”

“…The reduction of Sm 3+ to Sm 2+ ions in the solid state has been realized by several methods such as annealing in H 2 /N 2 and X-ray and γ-ray irradiation in a variety of crystal and glass hosts such as alkali earth fluorohalides, alkaline earth metal borophosphates, silicate glasses, and sodium aluminoborate glasses . Interestingly, it was reported that the reduction of Sm 3+ to Sm 2+ in some hosts can be realized by annealing in air, in particular in many alkaline earth borate hosts, such as in BaB 8 O 13 , SrB 4 O 7 , − SrB 6 O 10 , , CaSO 4 , and Li 2 O-SrO-B 2 O 3 glass-ceramics . In these hosts, it is believed that the rigid three-dimensional network of BO 4 tetrahedra plays an important role in the reduction of Sm 3+ ions .…”

Preparation and optical properties of Eu3+/Eu2+ in phosphors based on exchanging Eu3+-zeolite 13X

“…Lanthanide ions are energetically preferred as the trivalent state according to their electronic configurations, but some lanthanide ions can also exist as divalent states such as Eu 2+ , Sm 2+ , and Yb 2+ [1][2][3][4]. The Ln 3+ -activated luminescent materials (Ln = Eu, Tb, or Ce, and so on) have been acquired and applied successfully by many methods [5][6][7][8][9][10].…”