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Graphene was grown directly on nickel foam (NF) to form three dimensional graphene foam (GF), followed by growth of zinc oxide nanowires (ZNWs) on the surface of GF by hydrothermal method. In comparison with pristine GF, the ZNW/GF hybrid structure exhibited efficient field emission with a low turn-on field of 1.7V/µm, a low threshold field of 2.4 V/µm, high emission spot density, a high field enhancement...
Color sequential LCDs benefit from high efficiency and high resolution, but suffer from annoying color breakup. Various methods have recently been proposed to suppress color breakup, e.g., the stencil color sequential and local primary desaturation methods. Most of these approaches apply dimmable and multi-color LED matrix backlights to adjust the intensity and chromaticity of the display in both...
A good quality graphene is transferred onto honeycomb-like CNTs arrays with inner supporting CNTs. The efficient field emission is demonstrated due to a high aspect ratio protrusions and graphene crack edges. A high efficient current density about 1.2 mA/cm2 at threshold electric field of 7.8 V/μm with a turn-on electric field of 1.8 V/μm at the current density of 10 μA/cm2 is observed due to high...
The previous low utilization of the undergraduate student innovation lab led to a new management mode being adopted by the School of Electronic Science and Engineering of Southeast University. By transferring the administrative work of the innovation lab to undergraduate students themselves, including budgeting and annual planning, they are encouraged to think about what they want and what they can...
To study the mechanism of current degradation of a cold cathode, the outgassing measurement of a field emission diode with screen-printed CNTs cathode has been taken with a quadrupole mass spectrometer (QMS) in an ultra-high vacuum (UHV) system. It was found that the H2, CO2, and CO were outgassed from the diode during the working process. The field emission properties of the cold cathode, such as...
In this study, we fabricated a cathode using screen printing method with carbon nanotubes and ZnO nanotetrapods as cathode emission materials and CsI nanoparticles as coating materials. After several comparative experiments, we find that 3g CsI dispersed into an organic paste which is composed of 20ml terpineol and 1g ethyl cellulose has significant results to improve the performance of the field...
In this paper a normally-on driving under-gate FED is proposed. In this structure, the ratio of the cathode width to the thickness of the dielectric layer is reduced significantly comparing with the traditional under-gate FED. In the new driving scheme, the field emission electrons are extracted from the whole cathode surface by the high anode voltage directly. The effect of the under-gate is to prevent...
In order to study whether the ambient gases affect the emission current stability of the cathode, the cathode should be the same one. In addition, the working condition should be kept constant except the ambient gas condition, so that other factors, which may also lead to the emission current degradation of the cathode, can be avoided. Only the influence from the residual gases will be concerned....
A new structure of under-gate carbon nanotube (CNT) field emission display (FED)panel is proposed in this paper with normally-on driving scheme. In this structure, the gate electrode is still located beneath the cathode with the cathode and focus electrode arranged alternately. The effect of the under-gate is to prevent the field emission when the negative voltage is applied on the gate electrode...
In this paper, the authors report a simple method can control the CNTs distribution. The emission properties of screen-printed CNTs were improved after using with a wetting and dispersing additive simultaneously. Moreover, the screening effect of the agglomerated CNTs emitters are also numerically studied.
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