Enhanced field emission from ZnO nanowire arrays utilizing MgO buffer between seed layer and silicon substrate

Chen, Si; Chen, Jiangtao; Liu, Jianlin; Qi, Jing; Wang, Yuhua

doi:10.1016/j.apsusc.2016.06.085

Cited by 19 publications

(4 citation statements)

References 35 publications

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“…ITO (tin-doped indium oxide) film not only has a high transmittance and conductivity, but also can perform the function of a buffer layer to prevent the infiltration of water vapor and oxygen, as well as reduce the residual stress and structural defects in the film. Furthermore, ITO layer as a photo-generated electron collecting layer can enhance photocatalytic activity, and affect electron transport the same as MgO buffer layer 16 17 . However, the properties of ITO films are unstable when it is immersed in a wide range of aggressive aqueous solutions and its performance are easily affected by the pH of the solution 18 .…”

mentioning

confidence: 99%

Electrical and photocatalytic properties of boron-doped ZnO nanostructure grown on PET–ITO flexible substrates by hydrothermal method

Wang

2017

Sci Rep

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Boron-doped zinc oxide sheet-spheres were synthesized on PET–ITO flexible substrates using a hydrothermal method at 90 °C for 5 h. The results of X-ray diffraction and X-ray photoelectron spectroscopy indicated that the B atoms were successfully doped into the ZnO lattice, the incorporation of B led to an increase in the lattice constant of ZnO and a change in its internal stress. The growth mechanism of pure ZnO nanorods and B-doped ZnO sheet-spheres was specifically investigated. The as-prepared BZO/PET–ITO heterojunction possessed obvious rectification properties and its positive turn-on voltage was 0.4 V. The carrier transport mechanisms involved three models such as hot carrier tunneling theory, tunneling recombination, and series-resistance effect were explored. The BZO/PET–ITO nanostructures were more effective than pure ZnO to degrade the RY 15, and the degradation rate reached 41.45%. The decomposition process with BZO nanostructure followed first-order reaction kinetics. The photocurrent and electrochemical impedance spectroscopy revealed that the B-doping could promote the separation of photo-generated electron-hole pairs, which was beneficial to enhance the photocatalytic activity. The photocurrent density of B-doped and pure ZnO/PET–ITO were 0.055 mA/cm2 and 0.016 mA/cm2, respectively. The photocatalytic mechanism of the sample was analyzed by the energy band theory.

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confidence: 99%

Electrical and photocatalytic properties of boron-doped ZnO nanostructure grown on PET–ITO flexible substrates by hydrothermal method

Wang

2017

Sci Rep

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“…As introduced above, the reduced back-contact resistance can improve the emission current stability. Moreover, the turn-on field can be reduced and the maximum field-emission current density can increase as in the work of S. Chen et al [ 49 ], which utilized an MgO buffer layer between the ZnO nanowires and substrate. Other work also utilized the band to band tunneling-induced thermo-enhancement between the ZnO nanowire and p-type Si to improve the field emission current [ 100 ].…”

Section: Field Emissionmentioning

confidence: 99%

“…Moreover, the morphology effect on different doping ZnO nanowires may also contribute to this variation. In the early works on the modification of back-contact resistance, thin film layers such as AZO [46] and MgO [49] have been investigated as the buffer layer between ZnO nanowires and the substrate. Apart from the improved electron supply, the buffer layer can also adjust the morphology of the nanowire.…”

Section: Doping and Back-contact Resistancementioning

confidence: 99%

“…The foremost motivation for the research on FEAs is probably to apply them in the flat panel field-emission display. Since other display techniques such as LCD, OLED and quantum dots have been chosen by the industry in recent years, this attempt has faded away and been transferred to the applications of flat panel light source, X-ray source and In the early works on the modification of back-contact resistance, thin film layers such as AZO [46] and MgO [49] have been investigated as the buffer layer between ZnO nanowires and the substrate. Apart from the improved electron supply, the buffer layer can also adjust the morphology of the nanowire.…”

Section: Applicationsmentioning

confidence: 99%

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Recent Progress on ZnO Nanowires Cold Cathode and Its Applications

Chen

Deng

et al. 2021

Nanomaterials

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A cold cathode has many applications in high frequency and high power electronic devices, X-ray source, vacuum microelectronic devices and vacuum nanoelectronic devices. After decades of exploration on the cold cathode materials, ZnO nanowire has been regarded as one of the most promising candidates, in particular for large area field emitter arrays (FEAs). Numerous works on the fundamental field emission properties of ZnO nanowire, as well as demonstrations of varieties of large area vacuum microelectronic applications, have been reported. Moreover, techniques such as modifying the geometrical structure, surface decoration and element doping were also proposed for optimizing the field emissions. This paper aims to provide a comprehensive review on recent progress on the ZnO nanowire cold cathode and its applications. We will begin with a brief introduction on the synthesis methods and discuss their advantages/disadvantages for cold cathode applications. After that, the field emission properties, mechanism and optimization will be introduced in detail. Then, the development for applications of large-area ZnO nanowire FEAs will also be covered. Finally, some future perspectives are provided.

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Annealing temperature-dependent morphology, structure, and optical properties of well-aligned ZnO nanowire arrays

et al. 2018

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Enhanced field emission from ZnO nanowire arrays utilizing MgO buffer between seed layer and silicon substrate

Cited by 19 publications

References 35 publications

Electrical and photocatalytic properties of boron-doped ZnO nanostructure grown on PET–ITO flexible substrates by hydrothermal method

Electrical and photocatalytic properties of boron-doped ZnO nanostructure grown on PET–ITO flexible substrates by hydrothermal method

Recent Progress on ZnO Nanowires Cold Cathode and Its Applications

Annealing temperature-dependent morphology, structure, and optical properties of well-aligned ZnO nanowire arrays

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