• 제목/요약/키워드: field emission display

검색결과 360건 처리시간 0.026초

Effect of Current-Aging on Field Emission from Carbon Nanotube Field Emitter Arrays

  • Kim, Ki-Seo;Ryu, Je-Hwang;Lee, Chang-Seok;Manivannan, S.;Moon, Jong-Hyun;Ahn, Jung-Sun;Jang, Jin;Park, Kyu-Chang
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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    • pp.782-785
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    • 2007
  • We studied the effect of current-aging on field emission from carbon nanotubes field emitter arrays (CNT-FEAs) selectively patterned by the resist-assistan tpatterning(RAP) process. After sustaining the electric field when starting emission current density $(J_s)$ is $0.1\;mA/cm^2$ during 40 hrs, it was observed that the field emission property and uniformity were remarkably improved due to the elimination of oxygen atom and thus the reconstruction of carbon bonding at the tip of CNTs during 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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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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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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Numerical Calculation Study on the Generalized Electron Emission Phenomenon

  • Kim, Hee-Tae;Yu, Soon-Jae
    • Journal of Information Display
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    • 제10권4호
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    • pp.158-163
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    • 2009
  • There are two kinds of well-known electron emissions from metal: field and thermionic emission. For thermionic emission, electrons come out of a metal due to the thermal energy, whereas for field emission, electrons tunnel out of a metal through the strong electric field. In this study, the most general electron emission caused by the temperature and electric field with a free electron gas model was considered. The total current density of electron emission comes from the field emission effect, where the electron energy is lower than vacuum, and from the thermionic-emission effect, where the electron energy is higher than vacuum. The total current density of electron emission is shown as a function of the temperature for a constant electric field, and as a function of the electric field for a constant temperature.

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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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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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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Tubeless Packaging된 Field Emission Display의 개발 (Development of Tubeless-Packaged Field Emission Display)

  • 주병권;이덕중;이윤희;오명환
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제48권4호
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    • pp.275-280
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    • 1999
  • The glass-to-glass electrostatic bonding process in vacuum environment was developed and the tubeless-packaged FED was fabricated based on the bonding process. The fabricated tubeless-packaged FED showed stable field emission characteristics and potential applicability to the FED tubeless packaging and vacuum in-line sealing.

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A Novel Carbon Nanotube FED Structure and UV-Ozone Treatment

  • Chun, Hyun-Tae;Lee, Dong-Gu
    • Journal of Information Display
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    • 제7권1호
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    • pp.1-6
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    • 2006
  • A 10" carbon nanotube field emission display device was fabricated with a novel structure with a hopping electron spacer (HES) by screen printing technique. HES plays a role of preventing the broadening of electron beams emitted from carbon nanotubes without electrical discharge during operation. The structure of the novel tetrode is composed of carbon nanotube emitters on a cathode electrode, a gate electrode, an extracting electrode coated on the top side of a HES, and an anode. HES contains funnel-shaped holes of which the inner surfaces are coated with MgO. Electrons extracted through the gate are collected inside the funnel-shaped holes. They hop along the hole surface to the top extracting electrode. In this study the effects of the addition of HES on emission characteristics of field emission display were investigated. An active ozone treatment for the complete removal of residues of organic binders in the emitter devices was applied to the field emission display panel as a post-treatment.

Pt nanoparticles-coated Carbon nanofiber for FED application

  • Lee, Won-Woo;Choi, Young-Min;Ryu, Beyong-Hwan
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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    • pp.1590-1592
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    • 2007
  • In this study, we prepared CNF (carbon nanofiber) by the solvothermal method for FED (field emission display) applications. We controlled several conditions to synthesize effective CNF for field emission applications. Nano-sizesd Pt nanoparticles were coated on the CNF. In this study, we have applied Pt nanoparticles- coated CNF which can be produced in mass, to field emission application.

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Enhanced Electron Emission of Carbon Nanotube Arrays Grown Using the Resist-Protection-assisted Positioning Technique

  • Ryu, Je-Hwang;Kim, Ki-Seo;Yu, Yi-Yin;Lee, Chang-Seok;Lee, Yi-Sang;Jang, Jin;Park, Kyu-Chang
    • Journal of Information Display
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    • 제9권4호
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    • pp.30-34
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    • 2008
  • Field emitter arrays (FEAs) were developed using carbon nanotubes (CNTs) as electron emission sources. The CNTs were grown using a selective-positioning technique with a resist-protection layer. The light emission properties were studied through the electron emission of the CNTs on patterned islands, which were modulated with island diameter and spacing. The electron emission of CNT arrays with $5{\mu}m$ diameters and $10{\mu}m$ heights increased with increased spacing (from $10{\mu}m$ to $40{\mu}m$). The electron emission current of the $40-{\mu}m$-island-spacing sample showed a current density of 1.33 mA/$cm^2$ at E = 11 V/${\mu}m$, and a turn-on field of 7 V/${\mu}m$ at $1{\mu}A$ emission current. Uniform electron emission current and light emission were achieved with $40{\mu}m$ island spacing and $5{\mu}m$ island diameter.

Field Emission Enhancement by Electric Field Activation in Screen-printed Carbon Nanotube Film

  • Lee, Hyeon-Jae;Lee, Yang-Doo;Cho, Woo-Sung;Kim, Jai-Kyeong;Hwang, Sung-Woo;Ju, Byeong-Kwon
    • Journal of Information Display
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    • 제6권4호
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    • pp.45-48
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    • 2005
  • By applying a critical field treatment instead of the conventional surface treatments such as soft rubber roller, ion beam irradiation, adhesive taping, and laser irradiation, electron emission properties of screen-printed carbon nanotubes (CNTs) were enhanced and investigated based on the emission current-voltage characteristics through scanning electron microscopy. After nanotube emitters were activated at the applied electric-field of 2.5 V/um, the electron emission current density with good uniform emission sites reached the value of 2.13 mA/$cm^2$ , which is 400 times higher than that of the untreated sample, and the turn-on voltage decreased markedly from 700 to 460 V. In addition, enhancement of the alignment of CNTs to the vertical direction was observed.