Field Electron Emission of ZnO Nanowire Pyramidal Bundle Arrays

Hs, Song; Zhang, Wenjun; Yb, Tang; He, Zhaojian; Gd, Yuan; Fan, Xiaohui; Cs, Lee; Bello, I.; St, Lee

doi:10.1166/jnn.2010.1916

Cited by 5 publications

(7 citation statements)

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“…Zinc oxide (ZnO) is a very well known II-IV semiconductor having interesting unique properties that lead to its applications in sensors, optoelectronic, and nanoelectronic devices (Wang et al 2006;Song et al 2010;Umar et al 2009a, b;Rout et al 2009). Due to its wide band gap of 3.37 eV and large exciton binding energy of 60 meV (Wang et al 2009a), it exhibits stable UV emission (Duan et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Chemical growth of hexagonal zinc oxide nanorods and their optical properties

Samanta¹,

Bandyopadhyay²

2011

Appl Nanosci

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A simple wet chemical method has been successfully deployed to fabricate hexagonal zinc oxide nanorods. The structural characteristics were investigated through X-ray diffraction. The crystal unit cell of the nanorods was found to be hexagonal. The morphology of the nanostructures was studied using field emission scanning electron microscopy and transmission electron microscopy. The nanorods are hexagonal in shape. The Zn-O bond formation was confirmed through Fourier transformed infrared spectroscopic analysis. Raman shift measurements revealed various vibrational modes present in the ZnO crystal. The photoluminescence spectrum shows shallow deep level visible emission due to various defect states. Thus, our investigation will be very helpful in the development of ZnO based light emitting/optoelectronic device applications.

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Section: Introductionmentioning

confidence: 99%

Chemical growth of hexagonal zinc oxide nanorods and their optical properties

Samanta¹,

Bandyopadhyay²

2011

Appl Nanosci

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“…According to this relationship, the emission current I (in A) during gas exposure can be expressed in Eq. (2).…”

Section: Resultsmentioning

confidence: 99%

“…In the last few years, different kinds of ZnO nano-materials has been synthesized and applied as the cathode materials for field emission. [2][3][4] Although the electron emission form ZnO is not metal field emission, Fowler-Nordheim (F-N) equation 5 was always adopted to describe it, 6 7 ln…”

Section: Introductionmentioning

confidence: 99%

Effect of CO on the Field Emission Properties of Tetrapod Zinc Oxide Cathode

Wang¹,

Zhang²,

Lei³

et al. 2012

j nanosci nanotechnol

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Tetrapod zinc oxide (T-ZnO), being a kind of nano-material, has large specific surface area and surface binding energy, which will make it sensitive to the ambient gas condition. So the field emission properties will be influenced by the gas adsorption when being applied as the cathode materials of field emission devices. Carbon monoxide is the main residual gas in T-ZnO field emission devices. In this paper, carbon monoxide was introduced into a field emission device with T-ZnO emitters. The field emission currents of tetrapod ZnO were compared before and after exposure to CO.

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“…Among all ZnO nanostructures, ZnO nanowires (ZnO NWs) are of the main interest due to their high aspect ratio (AR), the proportion of length/diameter and is related to the effective surface area. Also, ZnO NWs present effective confinement of photons and carriers (Song et al, 2010;Cui, 2012), and they provide a direct and fast pathway to the transportation of free charge carriers (Karst et al, 2011;Lee et al, 2011;Meng et al, 2014). These previous properties suggest ZnO NWs as a good candidate for UV laser, photocatalysis, solar cells, LEDs, and other photonic applications (Hong et al, 2008;Kang et al, 2008;Wijeratne and Bandara, 2014;Polyakov et al, 2016).…”

Section: Introductionmentioning

confidence: 98%

ZnO Nanowires/N719 Dye With Different Aspect Ratio as a Possible Photoelectrode for Dye-Sensitized Solar Cells

et al. 2021

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The vapor-liquid-solid (VLS) process was applied to fabricate zinc oxide nanowires (ZnO NWs) with a different aspect ratio (AR), morphological, and optical properties. The ZnO NWs were grown on a system that contains a quartz substrate with transparent conductive oxide (TCO) thin film followed by an Al-doped ZnO (AZO) seed layer; both films were grown by magnetron sputtering at room temperature. It was found that the ZnO NWs presented high crystalline quality and vertical orientation from different structural and morphological characterizations. Also, NWs showed a good density distribution of 69 NWs/μm2 with a different AR that offers their capability to be used as possible photoelectrode (anode) in potential future device applications. The samples optical properties were studied using various techniques such as photoluminescence (PL), absorption, and transmittance before and after sensitization with N719 dye. The results demonstrated that NW with 30 nm diameter had the best characteristics as feasible photoelectrode (anode) (high absorption, minimum recombination, high crystallinity). Also, the present samples optical properties were found to be improved due to the existence of N719 dye and Au nanoparticles on the tip of NWs. NWs grown in this work can be used in different photonic and optoelectronic applications.

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Field Electron Emission of ZnO Nanowire Pyramidal Bundle Arrays

Cited by 5 publications

References 0 publications

Chemical growth of hexagonal zinc oxide nanorods and their optical properties

Chemical growth of hexagonal zinc oxide nanorods and their optical properties

Effect of CO on the Field Emission Properties of Tetrapod Zinc Oxide Cathode

ZnO Nanowires/N719 Dye With Different Aspect Ratio as a Possible Photoelectrode for Dye-Sensitized Solar Cells

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