Microscopic origin of current degradation of fully-sealed carbon-nanotube field emission display

Kim, Seungchul; Cho, Eunae; Han, Seungwu; Cho, Youngmi; Cho, Sung Hee; Kim, Changwook; Ihm, Jisoon

doi:10.1016/j.ssc.2009.02.025

Cited by 11 publications

(7 citation statements)

References 18 publications

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“…For example, the precursors for organic radicals are organic peroxides, azo compounds, alkyl iodides, and diazonium salts. [12][13][14][15][16][17] The covalent bond formation in a tube by outer radicals has been ascertained by measuring their conductivity, because it reduces the conductance of the tube [18][19][20] due to sp 2 to sp 3 conversion at the binding site. 21 Although the functionalization can be utilized to modulate the electronic properties of a tube, the limited number of outer species that can be attached covalently to a tube wall suggests chemical inertness of the outer surface.…”

Section: Introductionmentioning

confidence: 99%

Chemically reactive species remain alive inside carbon nanotubes: a density functional theory study

Yumura

2011

Phys. Chem. Chem. Phys.

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The behavior of alkyl guest radicals inside carbon nanotube hosts with different diameters is analyzed using density functional theory (DFT) calculations. Here the inner alkyl radicals are assumed to be formed by decomposition of their precursors, which had been incorporated into the tubes. DFT calculations show that inner alkyl radicals prefer to exist separately from the nanotube wall (separate form) rather than forming an inner covalent bond with the wall (bound form). Keeping a radical apart from the inner wall is more likely for a more bulky radical inside a smaller diameter tube. A key to the preference for the separate forms over the bound forms is that the bound forms gain a weak attraction due to the formation of a bond with the inner wall. The weak attraction, ascribed to the inertness of the inner surface, is counteracted by destabilization due to deformations of a tube and radical induced by guest-host coupling. The energy balance argument illuminates that the inertness of the inner wall makes an alkyl radical species remain alive inside a tube and retain its reactivity. These findings can help us to understand experimental results where chemical reactions inside a tube proceed after guests are activated.

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Section: Introductionmentioning

confidence: 99%

Chemically reactive species remain alive inside carbon nanotubes: a density functional theory study

Yumura

2011

Phys. Chem. Chem. Phys.

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“…Carbon nanotubes (CNTs) are one of the most promising materials for applications in nanoelectronics such as field emission displays [1,2], super-capacitors [3,4], secondary batteries [5,6], field effect transistors [7,8], on-chip interconnect materials in integrated circuits [9,10], and various composites [11] because of their superior electronic, mechanical, and structural properties. In particular, CNTs have been extensively studied as field emission materials thanks to their unique properties of nanometer-sized diameter and high aspect ratio [12].…”

Section: Introductionmentioning

confidence: 99%

Improved field emission properties from carbon nanotubes grown onto micron-sized arrayed silicon pillars with pyramidal bases

Park

2015

Diamond and Related Materials

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“…[1][2][3] Especially as the field emission cathode, [4] CNTs have demonstrated great potentials in applications like field emission display (FED) and vacuum microwave devices. [5] Samsung has even demonstrated a fiveinch CNT FED, [6] which is possibly one of the few CNT-based devices that are very close to a commercial product. However, emission current low and long term instability are two possibly the main hampers for the real application of the CNTs as field emission cathode besides of the competitive from liquidcrystal display.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study on field emission properties of zinc oxide nanoparticles decorated carbon nanotubes

Li¹,

Wei-Man²,

Liu³

et al. 2015

Chinese Phys. B

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Field emission properties of zinc oxide (ZnO) nanoparticles (NPs) decorated carbon nanotubes (CNTs) are investigated experimentally and theoretically. CNTs are in situ decorated with ZnO NPs during the growth process by chemical vapor deposition using a carbon source from the iron phthalocyanine pyrolysis. The experimental field emission test shows that the ZnO NP decoration significantly improves the emission current from 50 µA to 275 µA at 550 V and the reduced threshold voltage from 450 V to 350 V. The field emission mechanism of ZnO NPs on CNTs is theoretically studied by the density functional theory (DFT) combined with the Penn-Plummer method. The ZnO NPs reconstruct the ZnO-CNT structure and pull down the surface barrier of the entire emitter system to 0.49 eV so as to reduce the threshold electric field. The simulation results suggest that the presence of ZnO NPs would increase the LDOS near the Fermi level and increase the emission current. The calculation results are consistent with the experiment results.

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Microscopic origin of current degradation of fully-sealed carbon-nanotube field emission display

Cited by 11 publications

References 18 publications

Chemically reactive species remain alive inside carbon nanotubes: a density functional theory study

Chemically reactive species remain alive inside carbon nanotubes: a density functional theory study

Improved field emission properties from carbon nanotubes grown onto micron-sized arrayed silicon pillars with pyramidal bases

Experimental and theoretical study on field emission properties of zinc oxide nanoparticles decorated carbon nanotubes

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