Effect of electrical aging on field emission from carbon nanotube field emitter arrays

Ryu, Jae-Chun; Kim, Ki Seo; Lee, C.S.; Jang, Jin; Park, Kyu Chang

doi:10.1116/1.2884757

Cited by 28 publications

(15 citation statements)

References 14 publications

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“…To measure the FE properties of the CNTs, the electrical aging process was performed for 50 repeatable FE cycles. The electrical aging process was carried out to produce stable FE [ 32 ]. Figure 4 A illustrates the current density vs. electric field characteristic of the CNT emitters after the electrical aging process.…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanotube Field Emitters Synthesized on Metal Alloy Substrate by PECVD for Customized Compact Field Emission Devices to Be Used in X-Ray Source Applications

et al. 2018

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In this study, a simple, efficient, and economical process is reported for the direct synthesis of carbon nanotube (CNT) field emitters on metal alloy. Given that CNT field emitters can be customized with ease for compact and cold field emission devices, they are promising replacements for thermionic emitters in widely accessible X-ray source electron guns. High performance CNT emitter samples were prepared in optimized plasma conditions through the plasma-enhanced chemical vapor deposition (PECVD) process and subsequently characterized by using a scanning electron microscope, tunneling electron microscope, and Raman spectroscopy. For the cathode current, field emission (FE) characteristics with respective turn on (1 μA/cm2) and threshold (1 mA/cm2) field of 2.84 and 4.05 V/μm were obtained. For a field of 5.24 V/μm, maximum current density of 7 mA/cm2 was achieved and a field enhancement factor β of 2838 was calculated. In addition, the CNT emitters sustained a current density of 6.7 mA/cm2 for 420 min under a field of 5.2 V/μm, confirming good operational stability. Finally, an X-ray generated image of an integrated circuit was taken using the compact field emission device developed herein.

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Section: Resultsmentioning

confidence: 99%

Carbon Nanotube Field Emitters Synthesized on Metal Alloy Substrate by PECVD for Customized Compact Field Emission Devices to Be Used in X-Ray Source Applications

et al. 2018

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“…The increases of emission current after electrical aging were typical property of RAP CNT emitters. [14] Figure 3 shows optical microscope image (a) and scanning electron microscope (SEM) (b) image of CNT emitters on the designed pixel. Each pixel has 12 CNT emitter dots with 3 m diameter.…”

Section: Resultsmentioning

confidence: 99%

63.2: Field Emission Display with Homogenized Carbon Nanotube Emitters Grown by Resist‐Assisted Patterning Process

Park

Eom

Lee

et al. 2012

Symp Digest of Tech Papers

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Field emission display (FED) was fabricated with resistassisted patterning (RAP) process grown carbon nanotube (CNT) emitters. Electron emission current uniformity was strongly improved by homogenizing process with silicon-on glass (SOG). The length of CNT emitters was homogenized with SOG coating and selective CNT etching process. Uniform CNT emitters were fabricated with the postgrowth homogenizing process. We fabricated 3 inch FED display with 32 m sub-pixel size with the CNT emitters.Electron emission current shows possible operation of the FED with 5 V/m gate field. The electron emission characteristics and display performance were discussed.

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“…In these conditions, the tip of taller CNT filaments only act as the emission site during FE [ 20 ]. Thus, to increase the emission sites and to enhance and stabilize the FE over a wide current range, the FE measurement is done by electrical aging treatment process [ 21 ]. The electrical aging treatment increases the emission sites by making the height of CNTs over a metal substrate uniform.…”

Section: Methodsmentioning

confidence: 99%

Direct Synthesis of Carbon Nanotube Field Emitters on Metal Substrate for Open-Type X-ray Source in Medical Imaging

et al. 2017

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We report the design, fabrication and characterization of a carbon nanotube enabled open-type X-ray system for medical imaging. We directly grew the carbon nanotubes used as electron emitter for electron gun on a non-polished raw metallic rectangular-rounded substrate with an area of 0.1377 cm2 through a plasma enhanced chemical vapor deposition system. The stable field emission properties with triode electrodes after electrical aging treatment showed an anode emission current of 0.63 mA at a gate field of 7.51 V/μm. The 4.5-inch cubic shape open type X-ray system was developed consisting of an X-ray aperture, a vacuum part, an anode high voltage part, and a field emission electron gun including three electrodes with focusing, gate and cathode electrodes. Using this system, we obtained high-resolution X-ray images accelerated at 42–70 kV voltage by digital switching control between emitter and ground electrode.

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Effect of electrical aging on field emission from carbon nanotube field emitter arrays

Cited by 28 publications

References 14 publications

Carbon Nanotube Field Emitters Synthesized on Metal Alloy Substrate by PECVD for Customized Compact Field Emission Devices to Be Used in X-Ray Source Applications

Carbon Nanotube Field Emitters Synthesized on Metal Alloy Substrate by PECVD for Customized Compact Field Emission Devices to Be Used in X-Ray Source Applications

63.2: Field Emission Display with Homogenized Carbon Nanotube Emitters Grown by Resist‐Assisted Patterning Process

Direct Synthesis of Carbon Nanotube Field Emitters on Metal Substrate for Open-Type X-ray Source in Medical Imaging

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