Extracting formal emission area by on-line processing of current-voltage data, using FN-type equations for the Schottky-Nordheim barrier

Popov, E. O.; Филиппов, С. В.; Kolosko, Anatoly G.; Romanov, P.A.; Forbes, Richard G.

doi:10.1109/ivnc.2016.7551514

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…samples, and the turn-on field was defined at a current density of 10 μA cm –2 . It should be stated that the simplified F–N formula is only valid for a basic approximation in relative field enhancement factor, and actual emission parameters need to be extracted from accurate field emission theory. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…It should be stated that the simplified F−N formula is only valid for a basic approximation in relative field enhancement factor, and actual emission parameters need to be extracted from accurate field emission theory. 27,28 Figure 7 shows the field emission J/E plots with the corresponding F−N plots (see inset) for samples of ZnO nanowires prepared from Al-coated Zn films. Figure 7b−e summarizes the density, turn-on field, field emission current at 4150 V, and the field enhancement factor versus the Al thickness.…”

Section: Resultsmentioning

confidence: 99%

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Optimizing the Field Emission Properties of ZnO Nanowire Arrays by Precisely Tuning the Population Density and Application in Large-Area Gated Field Emitter Arrays

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

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Zinc oxide (ZnO) nanowires are prepared for application in large area gated field emitter arrays (FEAs). By oxidizing Al-coated Zn films, the population density of the ZnO nanowires was tuned precisely by varying the thickness of the Al film. The nanowire density decreased linearly as the thickness of the Al film increased. Optimal field emission properties with a turn-on field of 6.21 V μm and current fluctuations less than 1% are obtained. This can be explained by the minimized screening effect and good electrical conductivity of the back-contact layer. The mechanism responsible for the linear variation in the nanowire density is investigated in detail. Addressable FEAs using the optimal ZnO nanowire cathodes were fabricated and applied in a display device. Good gate-controlled characteristics and the display of video images are realized. The results indicate that ZnO nanowires could be applied in large area FEAs.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Optimizing the Field Emission Properties of ZnO Nanowire Arrays by Precisely Tuning the Population Density and Application in Large-Area Gated Field Emitter Arrays

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

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“…In this regime, the electrons in the emitter are in thermodynamic apex radius larger than ∼10 nm [9,10]. The emitting surface area is an important parameter, because it is related to the emitter's lifetime and stability of its current-voltage characteristics [11]. In the experimental physics of field emission sources, one can attempt to estimate the values of the formal area of emission by analyzing the current-voltage characteristics plotted in FN coordinates [12][13][14] (i.e.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the notional area in cold field electron emission from arrays

Amorim

Dall’Agnol

Engelsen

et al. 2018

J. Phys.: Condens. Matter

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The notional area of field emission is an important parameter to correlate characteristic current density to the emission current, linking field emission theories to experimental observations. Recently, it has been reported that the notional area of emission contributes to the high brightness of large diameter emitters. Thus, it is necessary to understand how the notional area of emission depends on physical and geometrical parameters. In this work, we carried out numerical simulations to evaluate the notional area, A , considering cold field electron emission from a hemisphere on a cylindrical post (HCP) emitter in an array. An HCP is suitable to model classically carbon nanotubes or carbon nanofibres-like emitters. We provide the dependence of A on a wide range of physical and geometrical parameters, namely: the separation between the HCP emitters, the aspect ratio, radius, local work function and the macroscopic emission current. We explain the behavior of A as a function of these parameters and show in which cases A can be considered nearly constant. Our numerical results are within the framework of the standard Fowler-Nordheim (FN) theory and can simplify the modeling of the field emission phenomenon, because it directly relates simulation predictions to the currents observable experimentally. Also, this work provides information for experimentalists that can be useful to check the validity of the Schottky-Nordheim (SN) barrier upon the elementary FN theory.

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“…d, que é a distância entre a ponta do CNT e o anodo. Entretanto, S. Podenok et al (49) afirma que se for realizada uma rigorosa comparação entre os modelos teóricos e os dados experimentais ocorre algumas variações devido aos outros parâmetros presentes no modelo do fenômeno de emissão, como por exemplo, a função trabalho  e a blindagem eletrostática na extremidade dos CNTs que afetam a amplificação do campo local.2.5 ANÁLISE DA ÁREA EFETIVA DE EMISSÃOA área de emissão desempenha um papel importante no fenômeno FE, dado sua relação com a estabilidade e o tempo de emissão(56).onde n é um parâmetro da área extraído do gráfico de FN, se a emissão for ortodoxa (28,30). Para analisar o parâmetro de Schottky-Nordheim usarei a relação proposta por Forbes et al (30) que trata da correção na altura da barreira de potencial.…”

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Estudo comparativo entre simulação e experimentação sobre emissão de elétrons por efeito de campo elétrico de nanotubos de carbono orientados

Vanderlei de Amorim

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Extracting formal emission area by on-line processing of current-voltage data, using FN-type equations for the Schottky-Nordheim barrier

Cited by 4 publications

References 5 publications

Optimizing the Field Emission Properties of ZnO Nanowire Arrays by Precisely Tuning the Population Density and Application in Large-Area Gated Field Emitter Arrays

Optimizing the Field Emission Properties of ZnO Nanowire Arrays by Precisely Tuning the Population Density and Application in Large-Area Gated Field Emitter Arrays

Numerical analysis of the notional area in cold field electron emission from arrays

Estudo comparativo entre simulação e experimentação sobre emissão de elétrons por efeito de campo elétrico de nanotubos de carbono orientados

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