Exploring pure and RE co-doped (Eu3+, Tb3+ and Dy3+) gadolinium scandate: Luminescence behaviour and dynamics of energy transfer

Gupta, Santosh K.; Grover, V.; Shukla, Rakesh; Srinivasu, K.; Natarajan, V.; Tyagi, A. K.

doi:10.1016/j.cej.2015.07.043

Cited by 57 publications

(6 citation statements)

References 52 publications

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“…The estimated τ values for Eu 3+ were 1.1 ms for Eu La and 3.2 ms for Eu Lu and those for Tb 3+ were 1.3 ms for Tb La and 3.5 ms for Tb Lu at emission wavelengths λ em of both 545 and 552 nm. The τ values of Eu 3+ and Tb 3+ at A sites are in good agreement with those observed in some orthorhombic perovskite-type oxides. − …”

Section: Resultssupporting

confidence: 85%

Site-Selective Doping and Site-Sensitive Photoluminescence of Eu³⁺ and Tb³⁺ in Perovskite-Type LaLuO₃

et al. 2019

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Eu 3+ and Tb 3+ ions were site-selectively doped into LaLuO 3 with the orthorhombic perovskite-type structure (ABO 3 ), and their luminescence properties were examined considering the doping sites (A or B sites). The X-ray diffraction analysis revealed the expansion or contraction of the unit cell volumes of the materials depending on the doping sites. The spectra of X-ray absorption near edge structure for the Eu and Tb L III edge exhibited different shapes for the ions at A and B sites, confirming the site-selective doping of Eu 3+ and Tb 3+ in LaLuO 3 . The photoluminescence (PL) and PL excitation (PLE) spectra of the materials also showed some differences caused by the doping sites. The intensities of the Eu 3+ PL peaks derived from the 5 D 0 − 7 F 1 transitions and those from the 5 D 0 − 7 F 2 transitions were markedly different between Eu 3+ at A sites and those at B sites because of the different site symmetries. The splitting of the intense Tb 3+ PL peaks originating from the 5 D 4 − 7 F 5 transitions and the absence of PL peaks from 5 D 3 − 7 F J transitions were found only for Tb 3+ at B sites because of the strong crystal field at B sites. In addition to the PL spectra, the positions of PLE peaks originating from charge transfer transitions in Eu 3+ and the 4f−5d transitions in Tb 3+ depended on the doping sites. The successful site-selective doping enabled us to clarify the site-sensitive luminescence properties of Eu 3+ and Tb 3+ doped in the perovskite-type LaLuO 3 .

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Section: Resultssupporting

confidence: 85%

Site-Selective Doping and Site-Sensitive Photoluminescence of Eu³⁺ and Tb³⁺ in Perovskite-Type LaLuO₃

et al. 2019

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“…Owing to the importance associated with various applications of perovskite materials, high quality synthesis of them in well-defined size and morphology has become widely pursued in recent years. ,,,,− Our group has worked extensively on synthesis, properties, and application of various perovskite materials in the past two decades. ,,,,,− For the MSS of ABO 3 -type perovskite nanomaterials, Xue et al reviewed recent advances on the MSS of low dimensional perovskite nanomaterials . Cheng et al also published a review on the synthesis of perovskite nanocrystals using the MSS .…”

Section: Metal Oxide Nanomaterials Synthesized By the Mssmentioning

confidence: 99%

Recent Developments on Molten Salt Synthesis of Inorganic Nanomaterials: A Review

2021

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A wide range of inorganic nanomaterials with many fascinating properties and application potentials in widespread fields may be synthesized by wet chemical synthetic routes. To achieve scientific and commercial viability of nanomaterials with uniformity and scalability, it is necessary to develop efficient and cost-effective, preferably sustainable, methods. The molten salt synthesis (MSS) method is one such bottom-up technique to fabricate a wide variety of inorganic nanomaterials with tunable size, morphology, and surface characteristics. It is also environmentally friendly, cost-effective, simple to operate, easy to scale, and generalizable, etc. This review gives a critical overview on this emerging and rapidly developing method for making defect free nanomaterials in well-defined texture, surface, and morphology at a relatively low formation temperature. We have discussed its different aspects, including the role of molten salts, the choice of molten salts, the electrochemical aspects, some advanced modifications of the conventional MSS technique, and their implications. To show the most recent development on MSS synthesized inorganic nanomaterials, this review only encompasses the studies reported over the last six years (2015−2020). We have summarized technologically important and emerging families of inorganic nanomaterials such as metal oxides, fluorides, nitrides, silicides, chalcogenides, oxohalides, borides, and carbides. Finally, a few perspectives for the MSS method are highlighted. It is expected that this review will further attract scientists to explore the MSS method in making size-and shape-tunable nanomaterials.

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“…The lanthanum scandates (LaScO3) analyzed in this work, belong to the group of (distorted) perovskites characterized by the general formula AMO3. Oxides crystallizing in perovskite-type structures constitute a large group of compounds with appealing properties such as ferroelectricity, pyroelectricity and piezoelectricity under phase transitions to lower symmetric structures [48]. The compounds LaScO3 crystallize in an orthorhombically distorted GdFeO3type structure with the space group Pnma (no.…”

Section: Resultsmentioning

confidence: 99%

Structurally induced tuning of the relative sensitivity of LaScO3:Cr3+ luminescent thermometers by co-doping lanthanide ions

Elżbieciak-Piecka

Suta

Marciniak

2021

Chemical Engineering Journal

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Ratiometric luminescence thermometry for remote temperature sensing has been constantly gaining an increasing popularity due to its simplicity with yet high precision. Transition metal ions still have an underestimated potential in that area as their luminescence properties can be tuned by targeted modification of the host compound. In this work, we demonstrate that concept in the phosphor LaScO3:Cr 3+ by co-doping with various lanthanide ions that partially substitute the La 3+ ions of the host. It is demonstrated that the incorporated lanthanide ions affect the bond lengths of the [CrO6] 9octahedra in the structure and thus, have a subtle impact on the local crystal field around the Cr 3+ ions. The changes in the crystal field strength lead to a variation in the energy gap between the thermally coupled 2 E(g) and 4 T2(g) states of Cr 3+ . This has an immediate consequence for the potential use of Cr 3+ as a luminescent thermometer and allows to selectively tune the relative thermal sensitivity and performance of this ion by a suitable choice of the co-doped lanthanide ions. 4 T2(g) → 4 A2(g) transition is more prominent in intermediate to weak crystal fields. In contrast to

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Exploring pure and RE co-doped (Eu3+, Tb3+ and Dy3+) gadolinium scandate: Luminescence behaviour and dynamics of energy transfer

Cited by 57 publications

References 52 publications

Site-Selective Doping and Site-Sensitive Photoluminescence of Eu³⁺ and Tb³⁺ in Perovskite-Type LaLuO₃

Site-Selective Doping and Site-Sensitive Photoluminescence of Eu³⁺ and Tb³⁺ in Perovskite-Type LaLuO₃

Recent Developments on Molten Salt Synthesis of Inorganic Nanomaterials: A Review

Structurally induced tuning of the relative sensitivity of LaScO3:Cr3+ luminescent thermometers by co-doping lanthanide ions

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Exploring pure and RE co-doped (Eu3+, Tb3+ and Dy3+) gadolinium scandate: Luminescence behaviour and dynamics of energy transfer

Cited by 57 publications

References 52 publications

Site-Selective Doping and Site-Sensitive Photoluminescence of Eu3+ and Tb3+ in Perovskite-Type LaLuO3

Site-Selective Doping and Site-Sensitive Photoluminescence of Eu3+ and Tb3+ in Perovskite-Type LaLuO3

Recent Developments on Molten Salt Synthesis of Inorganic Nanomaterials: A Review

Structurally induced tuning of the relative sensitivity of LaScO3:Cr3+ luminescent thermometers by co-doping lanthanide ions

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Product

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Site-Selective Doping and Site-Sensitive Photoluminescence of Eu³⁺ and Tb³⁺ in Perovskite-Type LaLuO₃

Site-Selective Doping and Site-Sensitive Photoluminescence of Eu³⁺ and Tb³⁺ in Perovskite-Type LaLuO₃