Studies on structural and optical properties of pulsed laser deposited NiO thin films under varying deposition parameters

Singh, S. D.; Das, Arijeet; Ajimsha, R. S.; Singh, M. N.; Upadhyay, Anand; Kamparath, Rajiv; Mukherjee, C.; Misra, Pankaj; Rai, Sanjay; Sinha, A. K.; Ganguli, Tapas

doi:10.1016/j.mssp.2017.04.025

Cited by 25 publications

(12 citation statements)

References 21 publications

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“…However, this method applies high-energy pulses which may cause undesirable defects in the structure, and thereby change the electronic behavior of the films. PLD has been used to deposit various binary compounds [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

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Pulsed Laser Deposition of Rocksalt Magnetic Binary Oxides

et al. 2019

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Magnetic binary oxides with the rocksalt structure constitute an important class of materials for potential applications as electronic or electrochemical devices. Moreover, they often become a theoretical playground, due to the simple electronic and crystal structures, in the quest for novel phenomena. For these possibilities to be realized, a necessary prerequisite would be to grow atomically ordered and controllably-strained binary oxides on proper substrates. Here we systematically explore the use of pulsed laser deposition technique (PLD) to grow three basic oxides that have rocksalt structure but different chemical stability in the ambient atmosphere: NiO (stable), MnO (metastable) and EuO (unstable). By tuning laser fluence FL, an epitaxial single-phase NiO thin-film growth can be achieved in a wide range of growth temperatures 10 ≤ TG ≤ 750 °C. At the lowest TG, the out-of-plane strain raises to 1.5%, which is five times higher than in NiO film grown at 750 °C. MnO thin films that had long-range order were successfully deposited on the MgO substrates after appropriate tuning of deposition parameters. The growth of MnO phase was strongly influenced by FL and the TG. EuO films with satisfactory quality were deposited by PLD after oxygen availability had been minimized. Synthesis of EuO thin films at rather low TG = 350 °C prevented thermally-driven lattice relaxation and allowed growth of strained films. Overall, PLD was a quick and reliable method to grow binary oxides with rocksalt structure in high quality that can satisfy requirements for applications and for basic research.Thin-film deposition is a technique that can be used to control strain in materials [22]. The Curie temperature TC of EuO thin film is strongly dependent on the strain and on film thickness tF [23]. Dislocations in NiO thin films locally change the magnetic ordering from antiferromagnetic to ferromagnetic [24]. Such 'ferromagnetic' dislocations originate from a local non-stoichiometry at in dislocation cores where Ni is deficient. A slight deviation from the stoichiometry also changes the conduction behavior in NiO thin films. Oxygendeficient EuO shows metallic behavior with a substantial increase of the TC to 120 K [25]. The deposition of high-quality magnetic binary oxides, and the ability to control the level of strain and density of defects in their structure, are challenging tasks in materials science and solid-state physics.Pulsed-laser deposition technique (PLD) has many advantages for growing thin films of high-quality oxides [26][27][28][29][30][31]. PLD can preserve the stoichiometry of the film composition,

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Section: Introductionmentioning

confidence: 99%

“…Epitaxial NiO films can be obtained by PLD technique in a wide range of TG (even at room temperature) [33][34] and in a broad range of oxygen pressures [38]. Hetero-epitaxial NiO film on MgO substrate was successfully grown using PLD at room temperature [33].…”

Section: Introductionmentioning

confidence: 99%

Pulsed Laser Deposition of Rocksalt Magnetic Binary Oxides

et al. 2019

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“…All devices demonstrate similar response spectra with peaks at 320, 430, 620, and 680 nm. The peak at 320 nm originates from NiO with a bandgap of about 3.6 eV [51]. However, others match well with the electron transition of MoS 2 [52,53].…”

Section: Resultsmentioning

confidence: 59%

Ultrasensitive monolayer-MoS2 heterojunction photodetectors realized via an asymmetric Fabry-Perot cavity

et al. 2022

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Two-dimensional (2D) materials have attracted significant attention as a promising candidate for electronic and optoelectronic devices. However, low absorption impairs the performance of few-layer 2D material-based photodetectors (PDs). Herein, we purpose an asymmetric Fabry-Perot cavity consisting of a dielectric layer and metallic film to enhance the interactions between light and monolayer molybdenum disulfide (MoS 2 ). The external quantum efficiency of the monolayer MoS 2 heterojunction PD is enhanced by more than two orders of magnitude via optimizing the thickness of the dielectric layer. The monolayer-MoS 2 /nickel oxide heterojunction PD exhibits a large on/off ratio of 2 × 10 5 , a responsivity of 703 A W −1 , and an ultrahigh detectivity of 1.31 × 10 15 Jones. The detectivity is the best value ever reported for monolayer-MoS 2 heterojunction PDs. Our results may pave the way for high-performance 2D materialbased PDs.

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“…Various physical and chemical techniques can be employed for preparing pure and metaldoped NiO thin films for tuning changes in the surface morphology, optical, and structural properties of the as-prepared NiO films including sol-gel dip-coating [7,8], successive ionic layer adsorption and reaction (SILAR) [9], chemical bath deposition (CBD) [10,11], pulsed laser deposition (PLD) [12][13][14], spray pyrolysis [15,16], electrodeposition [17][18][19], and DC sputtering [20][21][22][23][24]. Deposited NiO thin films can be extensively used for various applications, including supercapacitor [25,26], gas sensors [24,27,28], electrochromic application [29,30], buffer layer in the organic solar cell [31,32], and photocatalysis [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Impact of heat treatment on the physical properties of sputtered nickel oxide thin films containing molybdenum

Abdelwahab¹,

Hammad²

2022

JOR

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The effect of annealing the substrate on the structural and optical properties of the nickel oxide thin films containing a fixed ratio of molybdenum was investigated. Energydispersive X-ray spectroscopy (EDX) revealed that the Mo ratio is 4.41 wt%. X-ray diffraction (XRD) revealed that the formed films comprise a phase of NiO0.96. The average crystallite size, dislocation density, and strain function were calculated. Atomic force microscopy (AFM) was employed to investigate the morphology and surface roughness. With the increase in the substrate temperature from 298 K to 673 K, the optical band gap values varied from 3.72 eV to 3.58 eV.

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Studies on structural and optical properties of pulsed laser deposited NiO thin films under varying deposition parameters

Cited by 25 publications

References 21 publications

Pulsed Laser Deposition of Rocksalt Magnetic Binary Oxides

Pulsed Laser Deposition of Rocksalt Magnetic Binary Oxides

Ultrasensitive monolayer-MoS2 heterojunction photodetectors realized via an asymmetric Fabry-Perot cavity

Impact of heat treatment on the physical properties of sputtered nickel oxide thin films containing molybdenum

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