Modelling of relation between synthesis parameters and average crystallite size of Yb2O3 nanoparticles using Box-Behnken design

Ünal, Fatma; Kaya, Faruk

doi:10.1016/j.ceramint.2020.07.155

Cited by 19 publications

(16 citation statements)

References 25 publications

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“…The source material Yb 2 O 3 powder they used has relatively high melting point of about 2346 °C. [122][123][124] For the conventional CVD methods, it is hard for the evaporation of Yb 2 O 3 powder. In their synthesis system, NaCl powder was used, which can increase the vapor pressure of Yb 2 O 3 power and decrease the energy barrier, leading to the formation of 2D YbOCl at 730-800 °C.…”

Section: Cvdmentioning

confidence: 99%

Recent Advances in 2D Rare Earth Materials

Chen

Han

Zhao

et al. 2020

Adv Funct Materials

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2D rare earth (RE) materials have received considerable attention in recent years due to the fascinating luminescence, magnetism, and electric properties originated from RE associated with sharp and various emission peaks, intrinsic 2D ferromagnetism, and incommensurate charge density wave. These materials might open up a new prospect in next‐generation lighting, magnetic devices, and phototransistors. Herein, a comprehensive review of 2D RE materials is presented, focusing on their recent progresses. First, the crystal structures of 2D RE materials are discussed. Then, typical synthesis methods such as mechanical exfoliation, molecular beam epitaxy, pulsed laser deposition, and chemical vapor deposition are introduced. Furthermore, various properties in luminescence, magnetism, and electronics are summarized. The recently reported RE‐based 2D novel photodetectors are outlined as three constructions: MoS2/RE, graphene/RE, and perovskite/RE, which show promising applications for both narrow and broad band detection arised from the special absorption windows of different RE elements. Finally, the conclusions and outlook of this area are proposed, such as exploring novel 2D RE compounds, improving stability, and broadening applications.

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Section: Cvdmentioning

confidence: 99%

Recent Advances in 2D Rare Earth Materials

Chen

Han

Zhao

et al. 2020

Adv Funct Materials

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“…All particles were investigated by X-ray diffraction technique (XRD) in order to find out phase structure. Using the XRD broadening data, lattice parameter (LP) and crystallite size (CS) values were computed with Williamson-Hall (W-H) and Cohen-Wagner (C-W) methods, respectively [5,14]. To characterize the microstructural parameter (lattice strain, dislocation density), average CS values were computed with W-H analysis integrated with uniform deformation model.…”

Section: Experimental Studymentioning

confidence: 99%

“…Among the lanthanide oxides, ytterbium oxide (Yb2O3) particles exhibit extraordinary properties [4]. Correspondingly, they have many application areas such as hightemperature superconducting materials, colored glasses, technical ceramic, varistors, catalyst, electro-catalysis, solid-state laser, phosphor, stabilizer, optical fiber, solid oxide fuel cell, medical echo probe, imaging, scintillator and NIR photovoltaic up-converters [1][2][3][5][6][7][8][9][10][11][12][13]. However, since its commercialized use in electronic devices is limited due to the high band gap (~5 eV) of Yb2O3, lanthanide dopant elements (such as La, Ho, Gd, Er, Eu etc.)…”

Section: Introductionmentioning

confidence: 99%

“…were integrated into the Yb2O3 host structure [1,2,[9][10][11]13]. They can be synthesized by many methods such as electrospinning, sol-gel, hydrothermal method, spray pyrolysis, precipitation [2,3,[5][6][7][8]. While there are limited number of publications on the production of lanthanide doped Yb2O3 particles [1,[9][10][11]13], there is no comprehensive study on the synthesis and photoluminescence (PL) properties of Yb2O3:Tb 3+ particles.…”

Section: Introductionmentioning

confidence: 99%

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Photoluminescence Investigation of Tb Doped Yb2O3 Phosphors Produced by Precipitation Method

Ünal

2021

Sakarya University Journal of Science

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In this study, un-doped and Tb doped ytterbium oxide (Yb2O3:Tb 3+ ) particles with different dopant rates (2, 4, 6 and 8 at. %) were produced by precipitation method, followed by subsequent calcination at 1000 °C for 2 h. The crystal structure of all particles was cubic Yb2O3 structure. The presence of Tb ion in Yb2O3 host structure was proved from the XRD peak shift results. The crystal structure expanded compared to un-doped Yb2O3 particles with doping, confirming calculated lattice parameter (LP) values. The LP, crystallite size (CS) and dislocation density values were in the range of 1.0428 -1.0596 nm, 16 -25 nm and 0.00189 -0.00391 nm -2 , respectively. Only one sharp emission peak was observed at 506 nm corresponding to 5 D4 -7 F6 transition (green emission) from photoluminescence (PL) spectra of the phosphor particles. The PL emission intensities were found to be strongly dependent on both CS and dopant rate. There was a positive correlation between increasing CS, decreasing lattice strain/dislocation density and PL intensity. Crystal defects decreased and PL intensity increased up to 6 at. % dopant rate.

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“…originating from their 4f electronic structure [1] [2] [3] [4] [5]. Besides, their functional properties are highly dependent upon crystallite size, composition, morphology, shape, size, precursor molarity, production method [4] [6] [7][1] [8]. Among them, terbium oxide (Tb 2 O 3 ) materials are used widely in many areas such as magnetooptical [9] [10] [11] [12], optical application [13] [1] [6] [14] [15] [16] [11] [17], magnetic application [3], electronic [7], optoelectronic devices [18], MRI contrast agents [19], electrochemical applications [6].…”

Section: Introductionmentioning

confidence: 99%

A Novel Strong Cyan Luminescence Emission of Tb2O3 Particles

Ünal

2021

Preprint

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Terbium oxide (Tb2O3) particles (NPs) were synthesized by precipitation method using ammonium carbonate as precipitation agent. Effects of precursor molarity (0.1, 0.15 and 0.2 M) on photoluminescence (PL) behaviour of the NPs were investigated. The presence of the Tb2O3 phase was confirmed by X-Ray Diffraction (XRD) and Fourier-transform infrared spectroscopy (FT-IR) analyses. Morphological investigations of the produced powders were made by Field Emission Gun-Scanning Electron Microscopy (FEG-SEM). It showed that the morphology of Tb2O3 particles transformed from the nanograin chain to bundles morphology of rod-like as the amount of precursor molarity increased. Emission spectrum were investigated by Photoluminescence (PL) Spectroscopy. All the Tb2O3 particles exhibited the strongest peak at 493 nm ascribed to 5D4-7F6 (magnetic dipole (MD), C2) transition. The increase in the number of C2 sites released from the MD transition with the increase of the precursor molarity caused a negative increase in the b* (yellowness/blueness of the emission) value in the CIE diagram, indicating that the colour shifted to the blue region. The Tb2O3 particles produced by the precipitation method exhibited novel strong cyan colour and the PL emission intensity increased with increasing molarity.

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Modelling of relation between synthesis parameters and average crystallite size of Yb2O3 nanoparticles using Box-Behnken design

Cited by 19 publications

References 25 publications

Recent Advances in 2D Rare Earth Materials

Recent Advances in 2D Rare Earth Materials

Photoluminescence Investigation of Tb Doped Yb2O3 Phosphors Produced by Precipitation Method

A Novel Strong Cyan Luminescence Emission of Tb2O3 Particles

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