Luminescence properties of Sm3+ doped Na2B4O7 glasses for lighting application

Ullah, Ikram; Khan, I.; Shah, Said Karim; Khattak, Shaukat Ali; Shoaib, Mohammed; Kaewkhao, J.; Ahmad, Tanveer; Ahmed, Ejaz; Rooh, Gul; Khan, Arshad

doi:10.1016/j.jlumin.2020.117700

Cited by 50 publications

(9 citation statements)

References 38 publications

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“…Lifetime is assessed from Equation ( 4) and found to be 1.28, 1.32, 1.68, 0.42, 0.28, 0. MG [44], 1.8 ms for NBOSm10 [45], 1.81 ms for GNS1.0 [46], 1.87 ms (BSYCaSm03) [20], 2.06 ms (NNS05) [35], 1.94 ms (LiPbFPS05) [34],…”

Section: Decay Curve Analysismentioning

confidence: 99%

“…Furthermore, the ionic state of Sm 3+ ions can be straightforwardly reduced to the Sm 2+ state under a reducing atmosphere [25], ionization [26], or irradiation of ultrafast lasers [27] and spectral hole scorching studies [28]. But, less attention has been paid by researchers to a systematic analysis of heavy metal oxidemodified Sm 3+ -doped borate glass [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] related to the other Ln 3+ ions because of intense emissions. It is utilized definitely for the combination of other Ln 3+ ions for improving the luminescence quantum efficiency, which is important in the field of optoelectronics [48,49].…”

mentioning

confidence: 99%

“…[29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. Among the JO variables, Ω 2 is highly sensitive to the prearrangement of host ions and asymmetric behaviour of the Sm 3+ ions, whereas the variables Ω 4 and Ω 6 can influence the concentration of Sm 3+ ions, index of refractive, glass host and photosensitive properties[56].…”

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confidence: 99%

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Orange‐red luminescence of samarium‐doped bismuth–germanium–borate glass for light‐emitting devices

Netheti¹,

Ravanamma²,

Ravi³

et al. 2023

Luminescence

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Samarium (Sm3+)‐doped glass has sparked a rising interest in demonstrating a noticeable emission in the range of 400–700, which is advantageous in solid‐state lasers in the visible region, colour displays, undersea communication, and optical memory devices. This study reports the fabrication of Sm3+‐doped bismuth–germanium–borate glasses were established using a standard melt‐quenching technique and inspection by absorption, steady‐state luminescence, and transient studies. The typical peaks of Sm3+ ions were detected in the visible range under 403 nm excitation. A strong emission band was detected at 599 nm that resembles the 4G5/2→6H7/2 transition of Sm3+ ions for BGBiNYSm0.5 glass. Furthermore, a reddish‐orange (coral) luminescence at 646 nm that resembles the 4G5/2→6H9/2 transition was also perceived. The stimulated emission cross‐section of 4G5/2 level for BGBiNYSm0.5 glass was 0.39 × 10−22 cm2. Lifetime of the 4G5/2 level was enhanced for the BGBiNYSm0.5 glass and decreased with an increase in active ion concentrations. The lifetime quenching of ions at the metastable state was because of energy transfer among Sm3+ ions by cross‐relaxation channels. Commission Internationale de l'Éclairage (CIE) coordinates were evaluated from the emission spectra. Moreover, all the findings recommend these glass as light‐emitting materials in the coral region at 599 nm for solid‐state lighting applications.

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Section: Decay Curve Analysismentioning

confidence: 99%

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confidence: 99%

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Orange‐red luminescence of samarium‐doped bismuth–germanium–borate glass for light‐emitting devices

Netheti¹,

Ravanamma²,

Ravi³

et al. 2023

Luminescence

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“…Thus, in subsequent works, the following compounds KBaR(BO 3 ) 2 , , KCaR(BO 3 ) 2 , Li 3 Ba 4 Sc 3 B 8 O 22 , LiBaTb 2 (BO 3 ) 3 , KSrY(BO 3 ) 2 , NaSr 4 La 3 (BO 3 ) 6 , and K 7 MIIRE 2 (B 5 O 10 ) 3 − were discovered. Another motivation for this study is the fact that borates containing sodium are one of the most popular phosphors. − For example, Na 3 R(BO 3 ) 2 (R = Y, La, Nd, Gd) crystallizing in the R space group has a low concentration quenching of luminescence. − …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Growth of Rare Earth Borates NaSrR(BO₃)₂ (R = Ho–Lu, Y, Sc)

et al. 2022

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NaSrR(BO 3 ) 2 (R = Ho−Lu, Y, Sc) compounds were obtained for the first time. Their structures exhibit disordered positions of Sr 2+ and Na + atoms while RO 6 polyhedra are connected through the BO 3 groups. Large distances between R atoms and high transparency in the range of 250−900 nm make them promising for phosphor applications. A pathway to obtain single crystals was shown by growing NaSrY(BO 3 ) 2 and NaSrYb-(BO 3 ) 2 by the top seeded solution growth method with Na 2 O-B 2 O 3 -NaF flux.

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“…Currently, a signi cant attention has been focussed on the photonic glasses which are having several applications in laser generation, optical telecommunication, solid state lighting, integrated photonic chips and smart windows for energy savings [1][2][3][4][5]. Furthermore, lathanide activated luminescent glasses have some assorted advantages over the conventional phosphors employed in the white light emitting diodes such as better heat resistance, less power consumption, superior luminous properties and their ease of production.…”

Section: Introductionmentioning

confidence: 99%

Corollary of Energy Transfer On Luminescence From Ce3+ / Eu3+ Co-Activated Glasses For White Light-Emitting Diodes

Lakkamraju

Kumar

Baek

et al. 2021

Preprint

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A series of singly and doubly Ce3+ / Eu3+ doped lithium borate (LBZ) glasses have been synthesized via melt quenching. XRD and SEM analysis confirmed the non-crystalline nature of glasses. The emission spectrum of Ce3+: LBZ glass reveals an extensive blue emission band at 447 nm (5d→4f) by exciting with 350 nm. An intense excitation band noticed at 393 nm (7F0→5L6) of Eu3+ in Eu3+: LBZ glass, which is associated with the excitation wavelength of near-ultraviolet LED chip. The luminescence spectra of Eu3+ disclose a strong red emission at 612 nm (5D0→7F2) excited with 393 nm. By raising the content of Eu3+ ions, the luminescence features were embellished remarkably. However, the dazzling red emission intensity of Eu3+ was ameliorated by the insertion of Ce3+ ions in co-activated glass due to energy transmission. Spectral overlap, fluorescence studies, decay dynamics, CIE coordinates and color purity corroborated the transfer of energy from Ce3+ to Eu3+. The CIE color coordinates of the optimized (1.0 Ce3+ + 1.0 Eu3+) co-doped glass has been shifted to the white light region. In view of these spectral features, 1.0 mol % Ce3+ + 1.0 mol % Eu3+: LBZ glass could be suggested as a promising candidate for the white light applications.

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Luminescence properties of Sm3+ doped Na2B4O7 glasses for lighting application

Cited by 50 publications

References 38 publications

Orange‐red luminescence of samarium‐doped bismuth–germanium–borate glass for light‐emitting devices

Orange‐red luminescence of samarium‐doped bismuth–germanium–borate glass for light‐emitting devices

Synthesis and Growth of Rare Earth Borates NaSrR(BO₃)₂ (R = Ho–Lu, Y, Sc)

Corollary of Energy Transfer On Luminescence From Ce3+ / Eu3+ Co-Activated Glasses For White Light-Emitting Diodes

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Luminescence properties of Sm3+ doped Na2B4O7 glasses for lighting application

Cited by 50 publications

References 38 publications

Orange‐red luminescence of samarium‐doped bismuth–germanium–borate glass for light‐emitting devices

Orange‐red luminescence of samarium‐doped bismuth–germanium–borate glass for light‐emitting devices

Synthesis and Growth of Rare Earth Borates NaSrR(BO3)2 (R = Ho–Lu, Y, Sc)

Corollary of Energy Transfer On Luminescence From Ce3+ / Eu3+ Co-Activated Glasses For White Light-Emitting Diodes

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Product

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Synthesis and Growth of Rare Earth Borates NaSrR(BO₃)₂ (R = Ho–Lu, Y, Sc)