Low Temperature Synthesis of Lithium-Doped Nanocrystalline Diamond Films with Enhanced Field Electron Emission Properties

Abstract

Low temperature (350 °C) grown conductive nanocrystalline diamond (NCD) films were realized by lithium diffusion from Cr-coated lithium niobate substrates (Cr/LNO). The NCD/Cr/LNO films showed a low resistivity of 0.01 Ω·cm and excellent field electron emission characteristics, viz. a low turn-on field of 2.3 V/µm, a high-current density of 11.0 mA/cm2 (at 4.9 V/m), a large field enhancement factor of 1670, and a life-time stability of 445 min (at 3.0 mA/cm2). The low temperature deposition process combined with the excellent electrical characteristics offers a new prospective for applications based on temperature sensitive materials.

Electron Emission Devices for Energy‐Efficient Systems

“…It can be used as a tool to achieve enhanced emission current at lower electric field thresholds. Some of the recently used dopants are metals and metal oxides including Au, Pt, Al, Cu, In, boron, carbon, graphdiyne, silicon, lithium, nitrogen, and tin sulfide . In this context, introducing oxygen vacancy doping for enhanced field emission is gaining significant interest in recent years due to its easy processing.…”

Improvement of field emission performances by DMSO and PEDOT:PSS treated freestanding CNT clusters

“…Hence, although the turn-on electric field is not significantly improved and is still much higher than those of many reported ultralow turn-on field emitters, these two treatment methods greatly extend the lifetime of CNT emitters, which is longer than the lifetime of those field emitters with lower turn-on electric fields. [16][17][18][19][20][21][22]24,44,45 Therefore, this simple and costsaving treatment gives CNT emitters an advantage over other types of CNT emitters as well as other carbon material-based emitters.…”

“…Hence, because of the low lifetime of CNT field emitters, researchers gradually turned to finding other carbon materials with better field emission properties, such as diamond or nano walls. [16][17][18][19][20] These carbon-based field emitters have been found to have lower turn-on voltages and more stable emission currents and longer lifetime, especially after certain chemical treatments. However, these types of emitters usually have a relatively more complex and costly fab-rication process.…”

Nanoscale Investigation on the Improvement of Electrical Properties of Boron-Doped Diamond Nanostructures for High-Performance Plasma Displays

“…However, since the cathode material in plasma systems is constantly bombarded by ions, its stability becomes crucial. Scientists are therefore looking for a durable cathode material for plasma devices. − …”