Preliminary results on effect of boron co-doping on CW-OSL and TL properties of LiMgPO4: Tb, B

Bajaj, N. S.; Palan, C. B.; Koparkar, K. A.; Kulkarni, M.S.; Omanwar, S. K.

doi:10.1016/j.jlumin.2016.02.003

Cited by 44 publications

(6 citation statements)

References 15 publications

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“…Since 2010, almost 30 research papers on luminescent properties of differently doped LMP, as a good candidate for application in ionizing radiation dosimetry, have been published [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29]. Among them, the Tb and B co-doped LMP is most extensively studied [6,7,8,9,11,12,16,17,19,24,26,27,28], however, the other rare-earths dopants, like e.g., Eu [5,13,15,29], Sm [10,15], Tm [23,29], Er [29], and Y [29], were also considered and investigated. In most cases, the samples in form of the powders or cold-pressed and sintered pellets (mixed with polytetrafluoroethylene, PTFE) have been studied, but also the LMP crystals were successfully grown from the melt by micro-pulling-down method [4,18,21,22,29].…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping

et al. 2019

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We investigated the influence of terbium and thulium trivalent rare-earth (RE) ions co-doping on the luminescent properties enhancement of LiMgPO4 (LMP) crystal host. The studied crystals were grown from the melt by micro-pulling-down (MPD) technique. Luminescent properties of the obtained crystals were investigated by thermoluminescence (TL) method. The most favorable properties and the highest luminescence enhancement were measured for Tb and Tm double doped crystals. A similar luminescence level can be also obtained for Tm, B co-doped samples. In this case, however, the low-temperature TL components have a significant contribution. The measured luminescent spectra showed a typical emission of Tb3+ and Tm3+ ions of an opposite trapping nature, namely the holes and electron-trapping sites, respectively. The most prominent transitions of 5D4 → 7F3 (550 nm for Tb3+) and 1D2 → 3F4 (450 nm for Tm3+) were observed. It was also found that Tb3+ and Tm3+ emissions show temperature dependence in the case of double doped LMP crystal sample, which was not visible in the case of the samples doped with a single RE dopant. At a low temperature range (up to around 290 °C) Tm3+ emission was dominant. At higher temperatures, the electrons occupying Tm3+ sites started to be released giving rise to emissions from Tb-related recombination centers, and emissions from Tm3+ centers simultaneously decreased. At the highest temperatures, emission took place from Tb3+ recombination centers, but only from deeper 5D4 level-related traps which had not been emptied at a lower temperature range.

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Section: Introductionmentioning

confidence: 99%

Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping

et al. 2019

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“…The phosphors LiSr 4 (BO 3 ) 3 doped with Pr 3+ , Gd 3+ and Gd 3+ -Pr 3+ were prepared by a modified solid-state diffusion method. Palan et al [12,13] and Bajaj et al [14] )3 ) (99.99% purity) were used for preparation of phosphors. Stoichiometric amounts of starting materials with a little amount of double distilled water were mixed thoroughly in a china basin to obtain a homogeneous solution.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and photoluminescence study of narrow-band UVB-emitting LiSr4(BO3)3:Gd3+, Pr3+ phosphor

Chauhan

Bajaj²,

Omanwar

2017

Bull Mater Sci

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A series of Pr 3+ , Gd 3+ and Pr 3+-Gd 3+-doped inorganic borate phosphors LiSr 4 (BO 3) 3 were successfully synthesized by a modified solid-state diffusion method. The crystal structures and the phase purities of samples were characterized by powder X-ray diffraction. Surface morphology of the sample was studied by scanning electronic microscopy (SEM). The optimal concentrations of dopant Gd 3+ ions in compound LiSr 4 (BO 3) 3 were determined through the measurements of photoluminescence (PL) spectra of phosphors. Gd 3+-doped phosphors LiSr 4 (BO 3) 3 show strong band absorption in UV spectral region and narrow-band UVB emission under the excitation of 276 nm was only due to 6 P J → 8 S 7/2 transition of Gd 3+ ions. The effect of Pr 3+ ion on excitation of LiSr 4 (BO 3) 3 :Gd 3+ was also studied. The excitation of LiSr 4 (BO 3) 3 :Gd 3+ , Pr 3+ gives a broad-band spectra, which show very good overlap with the Hg 253.7 nm line. The photoluminescence spectra of LiSr 4 (BO 3) 3 with different doping concentrations Pr 3+ and keeping the concentration of Gd 3+ constant at 0.03 mol have also been studied. The emission intensity of LiSr 4 (BO 3) 3 :Pr 3+-Gd 3+ phosphors increases with increasing Pr 3+ doping concentration and reaches a maximum at 0.01 mol. From the photoluminescence study of LiSr 4 (BO 3) 3 :Gd 3+ , Pr 3+ we conclude that there was efficient energy transfer from Pr 3+ → Gd 3+ ions in LiSr 4−x−y Pr x Gd y (BO 3) 3 phosphors.

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“…The LMP:Tb,B phosphor is an OSL material with good performance. [20][21][22][23] Dhabekar et al 24 reported that the main TL peak temperature of LMP:Tb,B is 230 °C. The OSL intensity of LMP:Tb,B under excitation of by 470 nm blue light is 1.3 times higher than that of Al 2 O 3 :C. The excitation and emission spectra of LMP:Tb,B do not overlap, and the production process of LMP:Tb,B is simple.…”

Section: Introductionmentioning

confidence: 99%

Dosimetric and spectroscopic study of LiMgPO₄ doped with Tm³⁺ and Er³⁺

et al. 2023

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Preliminary results on effect of boron co-doping on CW-OSL and TL properties of LiMgPO4: Tb, B

Cited by 44 publications

References 15 publications

Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping

Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping

Synthesis and photoluminescence study of narrow-band UVB-emitting LiSr4(BO3)3:Gd3+, Pr3+ phosphor

Dosimetric and spectroscopic study of LiMgPO₄ doped with Tm³⁺ and Er³⁺

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Preliminary results on effect of boron co-doping on CW-OSL and TL properties of LiMgPO4: Tb, B

Cited by 44 publications

References 15 publications

Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping

Thermoluminescence Enhancement of LiMgPO4 Crystal Host by Tb3+ and Tm3+ Trivalent Rare-Earth Ions Co-doping

Synthesis and photoluminescence study of narrow-band UVB-emitting LiSr4(BO3)3:Gd3+, Pr3+ phosphor

Dosimetric and spectroscopic study of LiMgPO4 doped with Tm3+ and Er3+

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Dosimetric and spectroscopic study of LiMgPO₄ doped with Tm³⁺ and Er³⁺