Growth, polarized Raman and fluorescence properties of TbCa4O(BO3)3 single crystal

Yuan, Duorong; Gao, Zeliang; Jia, Zhitai; Shen, Jun; Li, Yang; Tao, Xiaofeng

doi:10.1016/j.optmat.2015.02.001

Cited by 9 publications

(3 citation statements)

References 28 publications

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“…Besides, it is worth mentioning that the experimental fluorescence lifetime of TbCOB in this work is significantly longer than that measured with a TbCOB single crystal exhibiting color centers (3.09 ms vs 2.07 ms). 62 This clearly shows the detrimental effect of color centers to the luminescence properties in the visible spectral range. 3.9.…”

Section: Resultsmentioning

confidence: 96%

Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr₃Tb(BO₃)₃, Li₆Tb(BO₃)₃, and TbCa₄O(BO₃)₃: Color Centers, Spectroscopic Properties, and Optical Gain

Chen

Loiseau

Aka

et al. 2020

Crystal Growth & Design

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This work aims to evaluate the prospect for visible laser applications of three terbium-based borate single crystals, viz. Sr3Tb(BO3)3 (STB), Li6Tb(BO3)3 (LTB), and TbCa4O(BO3)3 (TbCOB). Crystals with good optical quality were grown by the Czochralski technique. Formation of color centers was observed in the crystals grown in air atmosphere and was then circumvented by applying a reducing atmosphere during the growth process. The color centers were further studied by absorption and electron paramagnetic resonance spectroscopic characterization. Thermal properties that can impact laser operation, including thermal conductivity, specific heat capacity, and thermal expansion, were characterized using the as-grown crystals. The principal refractive indices of STB and LTB were measured experimentally. Cross sections of the 4f8 → 4f8 transitions of Tb3+ in these crystals were derived from the recorded absorption and emission spectra as well as the Judd–Ofelt calculations. The fluorescence decay curves from the 5D4 excited state were recorded to yield the fluorescence lifetimes. Experimental results and theoretical calculations indicate that these terbium-based crystals have minor nonradiative processes from the 5D4 manifold, and the transition cross sections in the visible spectra range are comparable to those of the previously reported gain media. Lastly, optical gain at 543 nm was measured in these crystals in a pump–probe scheme.

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Section: Resultsmentioning

confidence: 96%

Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr₃Tb(BO₃)₃, Li₆Tb(BO₃)₃, and TbCa₄O(BO₃)₃: Color Centers, Spectroscopic Properties, and Optical Gain

Chen

Loiseau

Aka

et al. 2020

Crystal Growth & Design

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“…Figure b exhibits the PL excitation spectrum of the same HfO 2 :Tb 3+ films, which was monitored with an emission wavelength at 543 nm. Here, it is possible to observe a spectrum with a broad band from 240 to 310 nm centered at 266 nm, which is attributed to the 4f 8 –4f 7 5d 1 transition of Tb 3+ ions, and the small peaks with the position from 320 to 400 nm belong to the transitions between energy levels of the 4f 8 configuration of Tb 3+ ions . Figure c shows the dependence of the emission intensity of the band centered at 543 nm for HfO 2 :Tb 3+ films as a function of the doping concentration; these films were deposited at 600 °C and excited with a wavelength of 266 nm; such emission intensity increases depending on the concentration of Tb 3+ ions, which reach its maximum emission intensity for 5 at.%; at higher concentrations than 5 at.%, the emission intensity decreases, very probably due to the concentration quenching phenomena.…”

Section: Resultsmentioning

confidence: 98%

Tunable white light emission from hafnium oxide films co‐doped with trivalent terbium and europium ions deposited by Pyrosol technique

Guzmán-Olguín

Montes

Guzmán‐Mendoza

et al. 2017

Physica Status Solidi (a)

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In this paper, the photo and cathodoluminescent properties of HfO2 films optically activated with different atomic concentrations of Tb3+ and Eu3+ ions, deposited by the Pyrosol technique, are reported. These films were deposited at temperatures from 400 to 600 °C, using chlorides as raw materials. The surface morphologies of all deposited films were rough and dense. X‐ray diffraction analysis showed that the films deposited at 600 °C were polycrystalline exhibiting the HfO2 monoclinic phase. The tuning by the means of the excitation wavelength generates photoluminescence spectra, for co‐doped films, in several emissions from blue to yellow (including white light) due to the characteristic electronic transitions of Tb3+ (green), Eu3+(red) ions and the violet‐blue emission associated to the host lattice (HfO2). According to the chromaticity diagram, the best white light is reached for the sample S2 excited with 382 nm (x = 0.3343, y = 0.3406). The cathodoluminescence emission spectra for co‐doped films showed emissions from green to red (including yellow, orange and other intermediate emissions). The averaged quantum efficiency values of the sample labeled as S2 resulted between 47 and 78% depending on the excitation wavelength. In addition, XPS, TEM, SEM and decay times were performed to characterize these films.

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“…78 The lifetime values reported in this work are also comparable with those in other phosphors activated by Tb 3+ and Eu 3+ , such as M 3 Eu 2 (BO 3 ) 4 (M = Ba, Sr), Li 2 Ca 5 Tb(BO 3 ) 5 , and TbCa 4 O(BO 3 ) 3 . [79][80][81]…”

Section: Fluorescence Lifetimementioning

confidence: 99%

Two new rare-earth borates Sr₂Tb₃B_27−δO₄₆ and Ba₂Eu₃B_27−δO₄₆ (δ = 2/3): syntheses, crystal structures, and luminescence properties

et al. 2022

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Growth, polarized Raman and fluorescence properties of TbCa4O(BO3)3 single crystal

Cited by 9 publications

References 28 publications

Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr₃Tb(BO₃)₃, Li₆Tb(BO₃)₃, and TbCa₄O(BO₃)₃: Color Centers, Spectroscopic Properties, and Optical Gain

Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr₃Tb(BO₃)₃, Li₆Tb(BO₃)₃, and TbCa₄O(BO₃)₃: Color Centers, Spectroscopic Properties, and Optical Gain

Tunable white light emission from hafnium oxide films co‐doped with trivalent terbium and europium ions deposited by Pyrosol technique

Two new rare-earth borates Sr₂Tb₃B_27−δO₄₆ and Ba₂Eu₃B_27−δO₄₆ (δ = 2/3): syntheses, crystal structures, and luminescence properties

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Growth, polarized Raman and fluorescence properties of TbCa4O(BO3)3 single crystal

Cited by 9 publications

References 28 publications

Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr3Tb(BO3)3, Li6Tb(BO3)3, and TbCa4O(BO3)3: Color Centers, Spectroscopic Properties, and Optical Gain

Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr3Tb(BO3)3, Li6Tb(BO3)3, and TbCa4O(BO3)3: Color Centers, Spectroscopic Properties, and Optical Gain

Tunable white light emission from hafnium oxide films co‐doped with trivalent terbium and europium ions deposited by Pyrosol technique

Two new rare-earth borates Sr2Tb3B27−δO46 and Ba2Eu3B27−δO46 (δ = 2/3): syntheses, crystal structures, and luminescence properties

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Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr₃Tb(BO₃)₃, Li₆Tb(BO₃)₃, and TbCa₄O(BO₃)₃: Color Centers, Spectroscopic Properties, and Optical Gain

Crystal Growth and Characterization of Terbium-Based Borate Crystals of Sr₃Tb(BO₃)₃, Li₆Tb(BO₃)₃, and TbCa₄O(BO₃)₃: Color Centers, Spectroscopic Properties, and Optical Gain

Two new rare-earth borates Sr₂Tb₃B_27−δO₄₆ and Ba₂Eu₃B_27−δO₄₆ (δ = 2/3): syntheses, crystal structures, and luminescence properties