• Title/Summary/Keyword: Field Emission

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Formulation of Carbon Nanotube Paste and Its Optimization for Field Emission Display Applications

  • Kim, Yong-C.;Sohn, K.H.;Cho, Y.M.;Yoo, Eun-H.;Lee, Dong-Gu
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.696-699
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    • 2004
  • Of the emissive display technologies, field emission displays using pasted carbon nanotubes offer several advantages over other competing cathode materials such as low driving voltage, possible large-area and low-cost processes. In this study, formulation of carbon nanotube paste and its electron field emission properties are characterized. Also the effects of additive powders and surface morphology on electron emission are reported.

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Post-Treatment of Printed Carbon Nanotubes for Vertical Alignment

  • Kim, Yong-C.;Sohn, K.H.;Cho, Y.M.;Yoo, Eun-H.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.692-695
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    • 2004
  • Fabrication of photosensitive carbon nanotubes paste and its post-treatment has been developed for high resolution with good electron emission uniformity. We report novel post-treatment techniques including rubber-rolling and multiple field emission cycling from which we could improve the field emission properties of printed carbon nanotubes. These techniques would be easily applicable to large area field emission display using paste of carbon nanotubes

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Stress distribution in glass panel of a field emission display without spacers and displacement thereof during vacuum packaging (Field Emission Display 용 진공 패키징시 진공하에서 유리 두께에 따른 유리에 걸리 는 응력 및 변위(Spacer 가 없는 경우))

  • 문제도
    • Journal of the Microelectronics and Packaging Society
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    • v.4 no.2
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    • pp.17-24
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    • 1997
  • Spacer가 없는 Field Emission Display 정보표시소자의 진공 패키징시 패널 유리 두 께에 따른 패널 유리가 받는 응력과 패널의 중앙 부위에서의 변위를 계산하였다. 판의 각 모서리가 고정된 상태에서 일정한 압력을 받는 경우의 bending moment로부터 우리가 받는 압력을 계산하였으며 3.7"와 5.7"크기의 두가지 경우를 실험하여 계산값과 파괴양상 및 중앙 에서의 변위를 비교하였다.변위를 비교하였다.

Electron Field Emission for a Cylindrical Emitter of Single Carbon Nanotube

  • Lee, Youn-Ju;Kim, Chang-Duk;Lee, Hyeong-Rag
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.764-767
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    • 2007
  • We investigated the field emission of single carbon nanotube including the anode effect by calculating the tunneling probability of an electron. The experimental results from this study were in agreement with our theoretical calculations. The constant enhancement factor was calculated using an approximation of the potential barrier.

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Field Emission Display with Design Elements for Control of Uniformity, Color Purity, Luminance, and Invisible Spacers.

  • Howard, Emmett M.;Coll, Bernard F.;Dean, Ken A.;Johnson, Michael R.;Johnson, Scott V.;Jaskie, James E.;Li, Hao
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.475-478
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    • 2007
  • A solution for carbon nanotube based field emission displays has been designed and built. The solution makes use of structure layout to control electron beam trajectories, uniformity by use of ballasting, emission anomalies eliminated by selective carbon nanotube growth and invisible spacers to maintain the vacuum gap.

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High quality tubular field emission lamp using a wire type carbon-nano-structure emitter (CNX)

  • Hiraki, Hirohisa;Harazono, Hideki;Onozawa, Takuya;Nakamoto, Masayuki;Hiraki, Akio
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1591-1593
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    • 2008
  • The tubular field emission lamp (FEL) was developed using a wire type carbon-nano-structure emitter called CNX The luminous efficiency of the tubular FEL (diode type, diameter: ${\varphi}15.5mm$, length: 200mm) has already achieved around 45lm/W and we expect to achieve over 60lm/W within the year.

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Study on the Driving property of planar gate light source (전계방출 광원용 플라나 게이트의 구동 특성 연구)

  • Kim, Kwang-Bok;Yang, Dong-Wook;Kim, Tae-Hyeon;Kim, Dae-Jun
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.148-150
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    • 2008
  • In this paper, we report the improved driving methode using planar-gate for field emission light source. Due to the cold cathode in field emission device, it has advantage for driving system in terms of high speed pulse driving with narrow duty ratio. This paper shows that our driving method offers the stable and reliable driving system without rapid electric field variation for field emission light source.

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Improved Field Emission Currents of Carbon Nanotubes after Laser Irradiation

  • Lee, Jung-Woo;Park, Jae-Hong;Yi, Whi-Kun
    • Bulletin of the Korean Chemical Society
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    • v.27 no.10
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    • pp.1651-1654
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    • 2006
  • Field emission (FE) currents were measured for silver-pasted and glass-pasted single-walled carbon nanotubes (SWNTs) after illuminating the tubes with a pulsed 532 nm laser. A very low turn-on field of approximately 0.4 V/m m and a high current density ~1700 $\mu A/cm^2$ at 3.5 V/m m was obtained for the silver-pasted SWNTs after laser irradiation but on the whole, no improvements were found for the glass-pasted SWNTs. Two roles of laser irradiation for the silver-pasted SWNTs were proposed. First, the embedded SWNTs and SWNT bundles inside the silver paste were immerged on the outer surface due to an instantaneous melting or annealing of the silver metals by the laser resulting in an increase of the field emission sites. Second, the laser irradiation was thought to improve the electrical contact between SWNTs and the silver metal by reducing the contact resistance via laser-induced thermal annealing, which was responsible for increasing the FE currents.

Fabrication of high-performance carbon nanotube field emitter using Thermal Chemical Vapor Deposition

  • Yu, Wan-Jun;Cho, You-suk;Park, Gyuseok;Kim, D.J.
    • Proceedings of the Materials Research Society of Korea Conference
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    • pp.43-43
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    • 2003
  • Carbon nanotubes(CNTs) have many application points, which are field emission devices, composites, hydrogen storage, nanodevices, supercapacitor and secondary battery. The most promising application point is emitter tip mays of field emission devices. Furthermore, it may be also useful as a vacuum device for high frequency and high power. But, there are some obstacles to fabricate carbon nanotube field emission device. One is that CNTs grown by CVD method has weak adhesion with substrate and the other is non-uniform length of them. These problems are very crucial in aging property and reliability of device in the field emission.

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Enhanced field emission properties of double-walled carbon nanotubes coated with lead selenide nanoparticles (셀렌화납 코팅을 통한 이중벽 탄소나노튜브의 전계방출특성 향상)

  • Shin, Dong-Hoon;Lee, Cheol-Jin;Choi, Young-Min;Kim, Jong-Ung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.3
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    • pp.594-598
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    • 2010
  • We studied on the field emission properties of double-walled carbon nanotubes (DWCNTs) coated with lead selenide (PbSe) nanoparticles. PbSe nanoparticles were uniformly attached on the surface of the DWCNTs by a simple chemical process. The PbSe-coated DWCNTs showed highly increased emission current density and enhanced emission stability over 20 h, compared with raw DWCNTs. We consider that the enhanced field emission properties of PbSe-coated DWCNTs were attributed to the increased field enhancement factor and lowered work function of the emitters.