Controllable Growth of Functional Gradient ZnO Material Using Chemical Vapor Deposition

Wang, Xing; Chu, Xueying; Zhao, Haifeng; Lu, Sen; Fang, Fang; Li, Jinhua; Fang, Xuan; Wei, Zhipeng; Wang, Xujie; Du, Peng; Wang, Xiaohua

doi:10.1080/10584587.2014.898552

Cited by 14 publications

(7 citation statements)

References 10 publications

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“…These methods have a number of benefits, including the ability to fabricate composites with near-net shapes at low temperatures. Metals evaporate in the case of physical vapour deposition, depositing onto the substrate [23,[27][28][29][30][31].…”

Section: Chemical Vapour Deposition/infiltrationmentioning

confidence: 99%

“…During the CVD process, if the gas concentration and rate of flow of gas are modified, there is a change in microstructure, thickness of the material formed, and chemical composition. Wang et al [31] looked into the effect of modifying the rate of gas during the manufacturing of functionally graded ZnO materials used in semiconductors. In addition, the authors created one-and two-dimensional nanowires, concluding that, unlike 1D nanowires, 2D functionally graded ZnO growth was not constrained to a single direction.…”

Section: Chemical Vapour Deposition/infiltrationmentioning

confidence: 99%

See 1 more Smart Citation

Functionally graded materials: review on manufacturing by Liquid and gas based techniques

Ramesh,

Karthik,

Jafrey Daniel James

et al. 2023

Mater. Res. Express

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New materials called functionally graded materials (FGMs) have qualities that gradually alter in relation to their dimensions. This collection of materials represents a significant advancement over earlier composite material. FGM is made up of two or more components that work together to produce the qualities necessary for the intended use. This article provides an overview of the various FGM classifications, fabrication techniques (gas based and liquid based), and applications. The problems associated with the manufacturing of FGM are addressed in the study. This paper also reviews the present state of knowledge in the areas of selection of material, manufacturing process, characterization studies, and modelling of FGM. The potential applications of the FGM, with their advantages and disadvantages, are discussed in this paper. The proposed new primary paths for FGMs research are based on the categories that have been presented and the most recent improvements in analysis and production methods.

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Section: Chemical Vapour Deposition/infiltrationmentioning

confidence: 99%

Section: Chemical Vapour Deposition/infiltrationmentioning

confidence: 99%

Functionally graded materials: review on manufacturing by Liquid and gas based techniques

Ramesh,

Karthik,

Jafrey Daniel James

et al. 2023

Mater. Res. Express

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“…Sputtering is a versatile and controllable technique capable of producing uniform, high-quality ZnO films with adjustable properties like thickness, morphology, crystallinity, and doping [21,22]. It can also be employed to create gradient structures of ZnO on CNTs, inducing a gradient in carrier concentration and enhancing the composite's photovoltaic response [23,24]. Furthermore, sputtering followed by subsequent thermal annealing can reduce defects, enhance crystallinity, and promote interfacial bonding, thereby improving the quality and performance of ZnO films [25,26].…”

Section: Introductionmentioning

confidence: 99%

Heat-Annealed Zinc Oxide on Flexible Carbon Nanotube Paper and Exposed to Gradient Light to Enhance Its Photoelectric Response

Liu,

Shen

2024

Nanomaterials

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Buckypaper (BP), a flexible and porous material, exhibits photovoltaic properties when exposed to light. In this study, we employed radio frequency (RF) sputtering of zinc oxide (ZnO) followed by rapid thermal annealing to enhance the photovoltaic response of BP. We investigated the impact of various sputtering parameters, such as the gas flow ratio of argon to oxygen and deposition time, on the morphology, composition, resistivity, and photovoltaic characteristics of ZnO-modified BP. Additionally, the photovoltaic performance of the samples under different illumination modes and wavelengths was compared. It was found that optimal sputtering conditions—argon to oxygen flow ratio of 1:2, deposition time of 20 min, and power of 100 watts—resulted in a ZnO film thickness of approximately 45 nanometers. After annealing at 400 °C for 10 min, the ZnO-modified BP demonstrated a significant increase in photocurrent and photovoltage, along with a reduction in resistivity, compared to unmodified BP. Moreover, under gradient illumination, the ZnO-modified BP exhibited a photovoltage enhancement of 14.70-fold and a photocurrent increase of 13.86-fold, compared to uniform illumination. Under blue light, it showed a higher photovoltaic response than under other colors. The enhancement in photovoltaic response is attributed to the formation of a Schottky junction between ZnO and BP, an increased carrier concentration gradient, and an expanded light absorption spectrum. Our results validate that ZnO sputtering followed by annealing is an effective method for modifying BP for photovoltaic applications such as solar cells and photodetectors.

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“…[12,13] The CVD and PVD methods make it possible to obtain very thin gradient coatings. [14,15] By changing the process parameters, i.e., temperature, the chemical composition of the substrate, gas pressure, and energy of the bombardment ions, it is possible to obtain a controlled width and structure gradient. The gradient in composites obtained in the liquid phase is achieved by electroplating, plasma spraying, and eutectic reactions.…”

Section: Introductionmentioning

confidence: 99%

Novel Functionally Gradient Composites Al2O3-Cu-Mo Obtained via Centrifugal Slip Casting

Zygmuntowicz

Winkler

Wachowski

et al. 2021

Metall Mater Trans A

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The investigations applied the original concept of the formation of materials as hybrid gradient composites. Two innovative technologies were used: formation by centrifugal slip casting and sintering with varying proportions of the liquid phase. This allowed us to create a gradient microstructure. This article presents the study of Al2O3-Cu-Mo gradient composites. This work aimed to determine the effect of the metallic phase content on the composite’s microstructure and basic properties. The most critical element of the study will be determining the ability to control the location and flow of the liquid phase during the sintering process. The research demonstrated that adding a third component in the form of Mo reduces the liquid Cu flow onto the surface of the composites during the sintering process. In this research, we achieve results with high cognitive value. Graphic Abstract

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Controllable Growth of Functional Gradient ZnO Material Using Chemical Vapor Deposition

Cited by 14 publications

References 10 publications

Functionally graded materials: review on manufacturing by Liquid and gas based techniques

Functionally graded materials: review on manufacturing by Liquid and gas based techniques

Heat-Annealed Zinc Oxide on Flexible Carbon Nanotube Paper and Exposed to Gradient Light to Enhance Its Photoelectric Response

Novel Functionally Gradient Composites Al2O3-Cu-Mo Obtained via Centrifugal Slip Casting

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