Transparent and flexible field electron emitters based on the conical nanocarbon structures.

Area of Science:

• Materials Science
• Nanotechnology
• Physics

Background:

• Field Emission Displays (FEDs) require efficient electron emitters.
• Transparent and flexible substrates are desirable for next-generation display technologies.
• Existing fabrication methods may not be suitable for room-temperature, transparent applications.

Purpose of the Study:

• To fabricate conical nanocarbon structures (CNCSs) on a transparent and flexible Nafion substrate.
• To investigate the application of these CNCSs in field emission displays (FEDs).
• To demonstrate room-temperature fabrication while maintaining substrate transparency.

Main Methods:

• Utilized an ion irradiation technique for CNCS fabrication.
• Employed scanning electron microscopy (SEM) for surface morphology analysis.
• Calculated numerical density and analyzed electron emission properties.

Main Results:

• Successfully fabricated CNCSs covering the entire sputtered Nafion surface with a density of 6 x 10^6 /mm^2.
• Achieved effective electron emission with a low turn-on field of 6.1 V/µm and threshold field of 9.5 V/µm.
• Determined a high field enhancement factor of 1020 via Fowler-Nordheim (F-N) plot analysis.

Conclusions:

• Room-temperature fabrication of CNCSs on transparent, flexible Nafion is feasible using ion irradiation.
• The fabricated CNCSs exhibit excellent electron emission characteristics suitable for FEDs.
• This approach offers a promising pathway for developing flexible and transparent FEDs.