TY - JOUR
T1 - Highly Crystalline Single-Walled Carbon Nanotube Field Emitters
T2 - Energy-Loss-Free High Current Output and Long Durability with High Power
AU - Shimoi, Norihiro
AU - Sato, Yoshinori
AU - Tohji, Kazuyuki
N1 - Funding Information:
This study was conducted as a project consigned by the New Energy and Industrial Technology Development Organization and was supported by JSPS KAKENHI Grant Number JP26220104. Y.S. was supported by JSPS KAKENHI Grant Number JP15H04131 and JP18H04145. We sincerely thank Marina Wayama (Hitachi High-Technologies Corporation, Japan) for help in the TEM observation and the guidance received.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/2/26
Y1 - 2019/2/26
N2 - 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.
AB - 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.
KW - field-emission electron sources
KW - high crystallinity
KW - high current output
KW - long durability
KW - single-walled carbon nanotubes
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U2 - 10.1021/acsaelm.8b00008
DO - 10.1021/acsaelm.8b00008
M3 - Article
AN - SCOPUS:85073813541
SN - 2637-6113
VL - 1
SP - 163
EP - 171
JO - ACS Applied Electronic Materials
JF - ACS Applied Electronic Materials
IS - 2
ER -
