Effects of color phosphors on the lifetime of field emission carbon thin films

Thuesen, L. H.

doi:10.1116/1.1375819

Cited by 3 publications

(2 citation statements)

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“…A long emission lifetime with a high loading current density by using highly crystalline SWCNTs was successfully achieved. The current #6 and #7 samples did not exhibit a field-emission loading half time, and highly crystalline SWCNTs demonstrate greater potential compared with the results of hitherto known CNT FE devices and related FE materials shown in Figure b. − In addition, electron-emission devices with field emitters were fabricated by a wet-coating process employing highly crystalline SWCNTs and SWCNTs with crystal defects under similar conditions, with similar dispersions and structures, to produce each electrode. Significant differences in the FE properties of each set of SWCNTs were observed, which depended on their crystallinity.…”

Section: Resultsmentioning

confidence: 90%

Highly Crystalline Single-Walled Carbon Nanotube Field Emitters: Energy-Loss-Free High Current Output and Long Durability with High Power

Shimoi

Sato

Tohji

2019

ACS Appl. Electron. Mater.

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Power consumption reduction and energy savings for field-emission (FE) electron sources for the loading of high current output, long durability, and high power are considerably challenging in the field of materials. Here we show a new approach using a simple structure comprising highly crystalline single-walled carbon nanotubes (SWCNTs) in the cathode for meeting these goals of power consumption and energy efficiency. Efficacy and applicability were successfully demonstrated by revealing the ideal FE properties of SWCNTs via the control of their crystallinity. The FE fluctuation and emission lifetime of highly crystalline SWCNTs exhibited good stability for greater than 1300 h at 30 mA/cm2 and durability with an FE high current density of 10 A/cm2 via the application of a direct current constant voltage in the cathodic planar field emitter. Moreover, field emitters using highly crystalline SWCNTs permitted the use of new vacuum power switches for the loading power operation of greater than 27 kW, with a high loading current without energy loss and a cooling system. Highly crystalline SWCNTs as a flat plane-emission device can serve as a technological breakthrough for realizing energy savings and a low-carbon society in daily life.

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Section: Resultsmentioning

confidence: 90%

Highly Crystalline Single-Walled Carbon Nanotube Field Emitters: Energy-Loss-Free High Current Output and Long Durability with High Power

Shimoi

Sato

Tohji

2019

ACS Appl. Electron. Mater.

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“…Figure4shows the relationship between the FE current density and the electric field in a high vacuum of 4.0 × 10 −3 Pa and a low vacuum of 2 Pa filled with argon (Ar) gas on a logarithmic scale (called the Fowler-Nordheim plot[26][27][28][29][30][31][32]) and planar lighting images. Overall, the turn-on fields for thin films with hc-SWCNTs and commercial SWCNTs in a high vacuum of 4.0 × 10 −3 Pa were less than 4 V µm −1 at 0.1 mA cm −2 .…”

mentioning

confidence: 99%

Field-emission durability employing highly crystalline single-walled carbon nanotubes in a low vacuum with activated gas

Shimoi

Tohji

2019

J. Phys. D: Appl. Phys.

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A new approach to improving power consumption and energy efficiency is to use a simple structure with highly crystalline single-walled carbon nanotubes (hc-SWCNTs) in the cathode. We succeeded in determining the efficacy and applicability of the field emission (FE) properties of hc-SWCNTs in a low vacuum below 0.1 Pa with activated gas. In particular, the FE of 1.0 mA cm−2 of hc-SWCNTs heated at 50 °C exhibits good stability for over 600 s in a low-vacuum atmosphere with oxygen added in a cathodic planar field emitter. The improved FE electrical properties of the hc-SWCNTs can likely be attributed to the increase in the crystallinity of the SWCNTs despite the low-vacuum atmosphere. It is further expected that the hc-SWCNT field emitters will be applicable to dry etching processes because single ionized molecules or radicals can be selectively synthesized with almost no energy loss and without requiring a cooling system. Our novel SWCNTs, as a component of a flat plane-emission device, may provide a technological breakthrough for realizing both energy saving and a low carbon environment in dry etching processes as well as in semiconductor industrial development.

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A Novel Approach to Artificial Energy-Loss Free Field Emitters: The Outstanding Cathodic Durability of High Crystallized Single-Walled Carbon Nanotubes

Shimoi

2020

Sustainable Production, Life Cycle Engineering and Management

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Effects of color phosphors on the lifetime of field emission carbon thin films

Cited by 3 publications

References 1 publication

Highly Crystalline Single-Walled Carbon Nanotube Field Emitters: Energy-Loss-Free High Current Output and Long Durability with High Power

Highly Crystalline Single-Walled Carbon Nanotube Field Emitters: Energy-Loss-Free High Current Output and Long Durability with High Power

Field-emission durability employing highly crystalline single-walled carbon nanotubes in a low vacuum with activated gas

A Novel Approach to Artificial Energy-Loss Free Field Emitters: The Outstanding Cathodic Durability of High Crystallized Single-Walled Carbon Nanotubes

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