Improvement of emission characteristics uniformity of carbon nanotube field emission display by surface treatment

Abstract

Carbon nanotubes (CNTs) have been investigated as an emitter for field emission display (FED). In our FED fabrication process, the printed CNTs are raised by a laser irradiation for the purpose to improve the emission characteristics. Because the emitters have to be controlled in each pixel individually on FED, the uniformity of the emission characteristics is necessary. We could improve the emission characteristics uniformity successfully by two methods. In the first method, the distribution of CNT raisings was homogenized by the modification of the irradiation pattern that consisted of an array of small areas. The emission deviation was improved to approximately half by the method. In the second method, the impurities of CNT raisings were cleaned by post-laser-irradiation of which fluence was lower than that of first irradiation. The emission characteristics improved and the turn-on electric field reduced from 2.1 to 1.4V∕μm. The emission deviation also improved to approximately half.

Improved field emission via laser processing of carbon nanotubes on paper substrates

“…Subsequently, the sample was exposed to single 25 ns pulses from a 248 nm UV excimer laser (Lambda Physik LPX210i) over a range of energies. The area of the laser spot was 0.18 cm A numerical summary of the FE characteristics is presented in Table 1 These results show strikingly similar changes in the FE characteristics to those observed by Hosono et al 23,24 In their work, a CNT-resin paste, screen printed onto glass substrates was laser treated. Here, pure o-MWNT inks on paper substrates are irradiated, suggesting that this technique can routinely be applied to CNT inks to improve their FE characteristics.…”

Enhanced field emission characteristics of zinc oxide mixed carbon nano-tubes films

“…To improve adhesion and emission uniformity of cathode film, CNT paste was synthesized using different inorganic and organic vehicles [7,8]. In addition, laser treatment [9][10][11], plasma treatment [12], mechanical rubbing [13][14][15] and adhesive tapping [16] have been applied to increase effective CNT emitters. Moreover, processing temperature and time [17,18] as effective parameter are also studied to activate more emission sites.…”

Field Emission Properties of the Dendritic Carbon Nanotubes Film Embedded with ZnO Quantum Dots

“…Li research group improved contact performance by inserting a transition layer between carbon nanotubes and substrate [6][7][8][9]. Chen group [10,11] discovered that the electron tunneling would be affected by the contact surface barrier between carbon nanotubes and substrate. Different Fower-Nordheim curves have been attributed for different kinds of Ohmic and Schottky contacts in their research.…”

“…Different Fower-Nordheim curves have been attributed for different kinds of Ohmic and Schottky contacts in their research. Shiroishi [11] research group decreased the turn-on voltage from 2.1 to 1.4 V/μm and improved the field emission characteristics by laser posttreatment on the carbon nanotubes. Yu [13] group selectively etched the carbon nanotubes film prepared through screenprinting, so as to remove the inorganic binder within the CNT cathode film and to enhance emission performance effectively.…”