Crystal growth, spectroscopic properties and energy levels of Cr3+:Li2Mg2(WO4)3: a candidate for broadband laser application

Li, Lingyun; Yu, Yan; Wang, Guofu; Zhang, Lizhen

doi:10.1039/c4ra05194g

Cited by 19 publications

(13 citation statements)

References 34 publications

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“…On the other hand, the lifetime of YOF: Yb 3+ , Er 3+ @400 C and YOF: Yb 3+ , Er 3+ @500 C is reasonably expected to be similar within the scope of instrument error, while that of YOF: Yb 3+ , Er 3+ @600 C is characteristic of a remarkable rising as the temperature increases, indicating the reduction of nonradiative transition procedure. 37,38 This phenomenon could be also interpreted by the enhancement of crystallinity of YOF: Yb 3+ , Er 3+ samples produced by higher calcinating temperature, which is consistent with the results of SEM and UCL spectra analyses.…”

Section: Upconversion Luminescence Propertiessupporting

confidence: 89%

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb³⁺, Er³⁺ powders

et al. 2015

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YOF: Yb 3+ , Er 3+ powders with rhombohedral phase were successfully synthesized by using a modified solgel method with calcinating under a temperature range between 400 C and 600 C. A systematic study on the temperature-dependent morphology and spectroscopic properties of rhombohedral YOF: Yb 3+ , Er 3+ powders have been performed. The YOF: Yb 3+ , Er 3+ powders that prepared at 400 C and 500 C exhibit a plate growth habit, while the powder that prepared at 600 C shows a sintering property. When excited by 980 nm laser beam, all of the rhombohedral YOF: Yb 3+ , Er 3+ powders show efficient red light emission with light wavelength ranging from 630 nm to 700 nm. The upconversion mechanism and luminescence decay properties were discussed in detail.

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Section: Upconversion Luminescence Propertiessupporting

confidence: 89%

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb³⁺, Er³⁺ powders

et al. 2015

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“…A detailed description of the synthesis is given in Xiao et al (2018). Briefly, LuPO 4 single crystals were obtained by a flux-growth method (Li et al, 2014, 2017). The starting material was a dry powder obtained from polycrystalline precursors and chemicals from Alfa Aesar.…”

Section: Methodsmentioning

confidence: 99%

A Spectroscopic Investigation of Eu3+ Incorporation in LnPO4 (Ln = Tb, Gd1-xLux, X = 0.3, 0.5, 0.7, 1) Ceramics

et al. 2019

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We have investigated the incorporation of the luminescent Eu 3+ cation in different Ln PO 4 ( Ln = Tb, Gd 1−x Lu x , x = 0.3, 0.5, 0.7, 1) host phases. All samples were analyzed with powder X-ray diffraction (PXRD), Raman spectroscopy, and site-selective time-resolved laser-induced luminescence spectroscopy (TRLFS) directly after synthesis and after an aging time of one year at ambient conditions. The PXRD investigations demonstrate the formation of a TbPO 4 phase in an uncommon anhydrite-like crystal structure evoked by a pressure-induced preparation step (grinding). In the Gd 1−x Lu x PO 4 solid solution series, several different crystal structures are observed depending on the composition. The TRLFS emission spectra of LuPO 4 , Gd 0.3 Lu 0.7 PO 4 , and Gd 0.5 Lu 0.5 PO 4 indicate Eu 3+ –incorporation within a xenotime-type crystal structure. TRLFS and PXRD investigations of the Gd 0.7 Lu 0.3 PO 4 composition show the presence of anhydrite, xenotime, and monazite phases, implying that xenotime no longer is the favored crystal structure due to the predominance of the substantially larger Gd 3+ –cation in this solid phase. Eu 3+ –incorporation occurs predominantly in the anhydrite-like structure with smaller contributions of Eu 3+ incorporated in monazite and xenotime. The electronic levels of the Eu 3+ –dopant in Gd 0.3 Lu 0.7 PO 4 and Gd 0.5 Lu 0.5 PO 4 xenotime hosts are strongly coupled to external lattice vibrations, giving rise to high-energy peaks in the obtained excitation spectra. The coupling becomes stronger after aging to such an extent that direct excitation of Eu 3+ in the xenotime structure is strongly suppressed. This phenomenon, however, is only visible for materials where Eu 3+ was predominantly incorporated within the xenotime structure. Single crystals of Eu 3+ –doped LuPO 4 show no changes upon aging despite the presence of vibronically coupled excitation peaks in the excitation spectra measured directly after synthesis. Based on this observation, we propose a lattice relaxation process occurring in the powder samples during aging, resulting in Eu 3+ migration within the crystal structure and Eu 3+ accumulation at grain b...

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“…Since the Eu 3+ ions replace La 3+ ions in the lattice of LBSO, the amount of Eu 2 O 3 was calculated by stoichiometric formula of La 1– x Eu x BSiO 5 . Once the composition of the flux was optimized, the top-seeded solution growth (TSSG) method described in refs and was used to grow large size crystals.…”

Section: Methodsmentioning

confidence: 99%

Flux Exploration, Growth, and Optical Spectroscopic Properties of Large Size LaBSiO₅ and Eu³⁺-Substituted LaBSiO₅ Crystals

Lin

Zhang

et al. 2017

Crystal Growth & Design

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This article reports the flux composition optimization, crystal growth, and optical spectroscopic properties of LaBSiO 5 and Eu 3+ -substituted LaBSiO 5 crystals. The mixture design technology was successfully applied in the crystal growth area for the first time. By the direction of mixture design method, the composition of a complex flux comprising LaBO 3 , SiO 2 , and Li 2 MoO 4 was optimized and used for growth of LaBSiO 5 crystals. A large size of Eu 3+ -substituted LaBSiO 5 crystal with dimension of 12 × 10 × 8 mm 3 has been prepared by top-seeded solution growth method. As far as we know, it is the first report that active ionsubstituted LaBSiO 5 bulk crystal was obtained from an environmentally friendly flux without fluorides. The optical spectroscopy and electronic transition properties of Eu 3+ -substituted LaBSiO 5 crystals are studied thoroughly by analyzing the excitation and emission spectra and luminescence decay curves. The luminescence of Eu 3+ ions are characteristic of intense red light emission corresponding to transitions of 5 D 0 → 7 F 1 and 5 D 0 → 7 F 2 . Meanwhile, the splitting of emission bands mentioned above is apparent because of the lower symmetry of lattice sites where the active ion locates. Furthermore, the symmetry properties of the lattice sites where Eu 3+ ions locate are investigated by using Judd−Ofelt theory. The value of intensity parameters of Eu 3+ -substituted LaBSiO 5 ranges from 4.19 to 4.89 when the Eu 3+ concentration varies.

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Crystal growth, spectroscopic properties and energy levels of Cr³⁺:Li₂Mg₂(WO₄)₃: a candidate for broadband laser application

Cited by 19 publications

References 34 publications

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb³⁺, Er³⁺ powders

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb³⁺, Er³⁺ powders

A Spectroscopic Investigation of Eu3+ Incorporation in LnPO4 (Ln = Tb, Gd1-xLux, X = 0.3, 0.5, 0.7, 1) Ceramics

Flux Exploration, Growth, and Optical Spectroscopic Properties of Large Size LaBSiO₅ and Eu³⁺-Substituted LaBSiO₅ Crystals

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Crystal growth, spectroscopic properties and energy levels of Cr3+:Li2Mg2(WO4)3: a candidate for broadband laser application

Cited by 19 publications

References 34 publications

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb3+, Er3+ powders

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb3+, Er3+ powders

A Spectroscopic Investigation of Eu3+ Incorporation in LnPO4 (Ln = Tb, Gd1-xLux, X = 0.3, 0.5, 0.7, 1) Ceramics

Flux Exploration, Growth, and Optical Spectroscopic Properties of Large Size LaBSiO5 and Eu3+-Substituted LaBSiO5 Crystals

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Crystal growth, spectroscopic properties and energy levels of Cr³⁺:Li₂Mg₂(WO₄)₃: a candidate for broadband laser application

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb³⁺, Er³⁺ powders

Synthesis, morphology and spectroscopic properties of red-luminescent rhombohedral YOF: Yb³⁺, Er³⁺ powders

Flux Exploration, Growth, and Optical Spectroscopic Properties of Large Size LaBSiO₅ and Eu³⁺-Substituted LaBSiO₅ Crystals