39.4: Large Size FED with Carbon Nanotube Emitter

Uemura, Sashiro; Yotani, Junko; Nagasako, Takeshi; Kurachi, Hiroyuki; Yamada, Hideaki; Ezaki, T.; Maesoba, Tsuyoshi; Saito, Yahachi; Yumura, Motoo

doi:10.1889/1.1830144

Cited by 43 publications

(39 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast to SWCNTs, MWCNTs have shown better emission stability; however, a small field enhancement factor has been attributed to low emission current [13]. Recently, double-walled carbon nanotubes have been studied for this purpose due to high current density with long-term emission stability, but the poor production rate and following purification process of catalysts have been a serious bottleneck [14].…”

Section: Surface Functionalization Of Fwcntsmentioning

confidence: 99%

Effect of few-walled carbon nanotube crystallinity on electron field emission property

Jeong¹,

Lee²,

Lee³

et al. 2011

Carbon letters

View full text Add to dashboard Cite

We discuss the influence of few-walled carbon nanotubes (FWCNTs) treated with nitric acid and/or sulfuric acid on field emission characteristics. FWCNTs/tetraethyl orthosilicate (TEOS) thin film field emitters were fabricated by a spray method using FWCNTs/TEOS sol one-component solution onto indium tin oxide (ITO) glass. After thermal curing, they were found tightly adhered to the ITO glass, and after an activation process by a taping method, numerous FWCNTs were aligned preferentially in the vertical direction. Pristine FWCNT/ TEOS-based field emitters revealed higher current density, lower turn-on field, and a higher field enhancement factor than the oxidized FWCNTs-based field emitters. However, the unstable dispersion of pristine FWCNT in TEOS/N,N-dimethylformamide solution was not applicable to the field emitter fabrication using a spray method. Although the field emitter of nitric acid-treated FWCNT showed slightly lower field emission characteristics, this could be improved by the introduction of metal nanoparticles or resistive layer coating. Thus, we can conclude that our spray method using nitric acid-treated FWCNT could be useful for fabricating a field emitter and offers several advantages compared to previously reported techniques such as chemical vapor deposition and screen printing.

show abstract

Section: Surface Functionalization Of Fwcntsmentioning

confidence: 99%

Effect of few-walled carbon nanotube crystallinity on electron field emission property

Jeong¹,

Lee²,

Lee³

et al. 2011

Carbon letters

View full text Add to dashboard Cite

show abstract

“…The tMWCNTs are known to show better field-emission characteristics than SWCNTs and MWCNTs. Previous studies [8,9] of tMWCNTs showed a high field-enhancement factor, like SWCNTs, with the long-term emission stability comparable to MWCNTs. This indicates that tMWCNTs are as sharp as SWCNTs and as strong as MWCNTs.…”

Section: Resultsmentioning

confidence: 88%

Fabrication of Carbon Nanotube Field Emitters Using a Dip‐Coating Method

Song

Kim

Choi

et al. 2006

Chemical Vapor Deposition

View full text Add to dashboard Cite

A simple and robust dip-coating method for fabricating carbon nanotube (CNT) field emitters has been proposed. The thin multiwalled (tMW)CNTs synthesized by CVD were dispersed in various solutions such as N,N-dimethylformamide (DMF), isopropyl alcohol (IPA), N-methyl-2-pyrrolidinone (NMP), and dichloroethane (DCE). The weak adhesion between CNTs and substrate, a serious drawback of the dip-coating approach, was resolved by anchoring CNTs to the substrate via the melting of an indium layer. We found that the uniformity and density of the CNTs could be optimized by controlling the degree of dispersion of CNTs in solvents. The field-emission characteristics are also discussed.

show abstract

“…Panels with various cold cathode structures have been tried to form in triode-type FEDs using carbon nanofiber cold cathode emitters [7][8][9][10][11][12]. In the cold cathode structures of these FEDs, the ratio of separation between the gate electrode and the cathode to the hole diameter of the gate electrode is 1:1 to 3:20.…”

Section: Fed Structure and Simulation Methodsmentioning

confidence: 99%

Computer simulation to expand emission area and decrease electron beam width for cold cathode of triode‐type FEDs

Muroi¹,

Ushirozawa²,

Yamamoto³

et al. 2005

Electron Comm Jpn Pt II

View full text Add to dashboard Cite

To decrease the electron beam width and expand the emission area of a triode‐type FED using GNF, a cold cathode structure is studied by simulation. In the simulation, not only the electron beam width but also the emission current are evaluated by means of the electric field emission characteristics of a GNF cold cathode emitter. If the surface shape of the cold cathode emitter is assumed hemispherical, the electron emission from the center of the cold cathode emitter is found to increase as the center height of the emitter is increased when the separation between the gate and the cathode is 3 µm and the gate hole diameter is 10 µm. If the anode current obtained from one cold cathode is 0.1 µA for a gate‐to‐cathode separation of 3 µm, the electron beam width increases as the center height of the cold cathode emitter is increased when the gate hole diameter is 10 or 20 µm. On the other hand, the electron beam width is almost constant if the gate hold diameter is 3 or 5 µm. As the gate hole diameter is reduced, the electron beam width is reduced. If the gate hole diameter is 3 µm, the electron beam width can be made less than 100 µm regardless of the height of the center of the cold cathode emitter. Further, when the emission area is studied for a gate hole diameter of 3 µm, the emission area reaches a maximum when the center height of the cold cathode emitter is identical to the cathode electrode. © 2005 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 88(4): 28–36, 2005; Published online in Wiley InterScience (http://www.interscience.wiley.com). DOI 10.1002/ecjb.20119

show abstract

39.4: Large Size FED with Carbon Nanotube Emitter

Cited by 43 publications

References 2 publications

Effect of few-walled carbon nanotube crystallinity on electron field emission property

Effect of few-walled carbon nanotube crystallinity on electron field emission property

Fabrication of Carbon Nanotube Field Emitters Using a Dip‐Coating Method

Computer simulation to expand emission area and decrease electron beam width for cold cathode of triode‐type FEDs

Contact Info

Product

Resources

About