Magnetic and optical behaviors of SnO2-x thin films with oxygen vacancies prepared by atomic layer deposition

Liu, Shoufa; Qiao, Xun; Wang, Yinwei; Xie, Huan; Zhang, Ning; Liu, Dancheng

doi:10.1016/j.ceramint.2018.11.040

Cited by 12 publications

(3 citation statements)

References 34 publications

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“…Obviously, the additively manufactured oxide eutectic ceramics before and after the annealing treatment contain three identical phases of α-Al 2 O 3 , GdAlO 3 , and t-ZrO 2 , indicating that the presence of oxygen vacancies does not change the crystalline structure of the 3D-printed eutectic ceramic. Similar results were obtained in oxide semiconductor materials such as WO 3 [25,29], TiO 2 [30], and SnO 2 [43]. Besides, the diffraction peaks of the same phase correspond to each other one by one without obvious shift, demonstrating that the applied annealing treatment does not change the stress state of the as-deposited eutectic composite.…”

Section: Effects Of Oxygen Vacancies On the Structure Of The 3d-print...supporting

confidence: 79%

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Liu

Shen

et al. 2022

J Adv Ceram

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Laser three-dimensional (3D) printing has become a significant technique to fabricate high-performance Al2O3-based eutectic ceramics based on melt growth. However, oxygen vacancies are inevitable crystal defects during this process, and their formation mechanism and roles in the as-deposited ceramics are still unclear. In this paper, Al2O3/GdAlO3/ZrO2 ternary eutectic ceramics were prepared by laser 3D printing, and the formation mechanism of the oxygen vacancies was revealed by conducting a well-designed annealing experiment. In addition, the effects of the oxygen vacancies on the structure and mechanical property of the as-solidified eutectic ceramic were investigated. The formation of oxygen vacancies is revealed to be a result of the transfer of oxygen atoms from the oxide ceramic to the oxygen-deficient atmosphere by means of vacancy migration mechanism. Besides, the presence of oxygen vacancies has no obvious effects on crystalline structure and microstructure of the additively manufactured eutectic ceramic. However, the chemical bond property changes to some extent due to the formation of these crystal defects, which may affect the mechanical property of the as-deposited eutectic ceramic. It is found that the hardness decreases by 3.9%, and the fracture toughness increases by 13.3% after removing the oxygen vacancies. The results may provide a potential strategy to regulate the mechanical property of the oxide ceramic materials.

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Section: Effects Of Oxygen Vacancies On the Structure Of The 3d-print...supporting

confidence: 79%

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Liu

Shen

et al. 2022

J Adv Ceram

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“…The peak associated with SnS 2 is relatively weak, which can be ascribed to the tiny grain size in the sample and the small thickness of the film. 36,37 This peak becomes weaker with increasing plasma-etching time, and vanishes in samples with plasma-etching time longer than 40 s. This result suggests that Ar-plasma etching results in the grainsize reduction and/or amorphization of SnS 2 , consistent with that revealed by TEM characterization.…”

Section: Resultssupporting

confidence: 74%

Enhancing Reverse Saturable Absorption in SnS₂ Nanosheets by Plasma Treatment

Diao

Sun

et al. 2021

ACS Appl. Mater. Interfaces

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The knowledge concerning the influence of defects on the nonlinear optical response of materials remains scarce so far. In this work, we have successfully introduced defects into SnS 2 nanosheets by plasma treatment and shown that a defect generation is an effective approach to significantly improve the reverse saturable absorption of SnS 2 . The SnS 2 nanosheets treated with Ar plasma for 40 s exhibit a nonlinear absorption coefficient (β 0 ) as large as (2.9 ± 0.12) × 10 4 cm GW −1 , which is nearly 9 times that of the untreated sample. The influence of Ar-plasma-treatment time, defect type, and defect number on the nonlinear absorption of SnS 2 nanosheets are also studied. Structure and spectroscopy characterization confirms the introduction of S and Sn vacancies with Ar-plasma etching. Surface photovoltage spectroscopy and density functional theory calculation indicate that S vacancies can induce in-gap states in the band gap. These in-gap states act as intermediate states for the successive absorption of photons during femtosecond laser excitation (namely, excited-state absorption). In contrast, Sn defects cannot lead to in-gap states and have a limited contribution to nonlinear absorption. Our result would provide a promising way to improve optical nonlinearities.

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“…4 However, there are some overwhelming roadblocks related to its n-type conductivity and origin of intrinsic ferromagnetism for DMSs, which restrict its long-term development and applications. One feasible project is to regulate and control defects on the surface of materials, [5][6][7][8][9][10][11] the other is doping 3d magnetic transition-metal ions (such as Fe, Co, Ni, Mn etc.) into the ZnO lattice.…”

Section: Introductionmentioning

confidence: 99%

Doping effect and oxygen defects boost room temperature ferromagnetism of Co-doped ZnO nanoparticles: experimental and theoretical studies

et al. 2019

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Magnetic and optical behaviors of SnO2-x thin films with oxygen vacancies prepared by atomic layer deposition

Cited by 12 publications

References 34 publications

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Enhancing Reverse Saturable Absorption in SnS₂ Nanosheets by Plasma Treatment

Doping effect and oxygen defects boost room temperature ferromagnetism of Co-doped ZnO nanoparticles: experimental and theoretical studies

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Magnetic and optical behaviors of SnO2-x thin films with oxygen vacancies prepared by atomic layer deposition

Cited by 12 publications

References 34 publications

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Formation mechanism and roles of oxygen vacancies in melt-grown Al2O3/GdAlO3/ZrO2 eutectic ceramic by laser 3D printing

Enhancing Reverse Saturable Absorption in SnS2 Nanosheets by Plasma Treatment

Doping effect and oxygen defects boost room temperature ferromagnetism of Co-doped ZnO nanoparticles: experimental and theoretical studies

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Enhancing Reverse Saturable Absorption in SnS₂ Nanosheets by Plasma Treatment