Abstract
Carbon nitride films have excellent properties and wide application prospects in the aspect of field emission properties. In this review structure characteristics and a variety of synthetic methods of carbon nitride film will be described. In the carbon nitrogen films, we mainly from the following three points: sp2/sp3ratio, surface morphology and N content to discuss the change of field emission properties. Appropriate sp2/sp3(about 1.0–1.25) ratio, N content (about 8 at.%–10 at.%), and rough surfaces will strengthen the field emission properties.
Highlights
In the 1989, Liu and Cohen [1, 2] theoretically predicted the structure and physical properties of β-C3N4 whose bulk modulus and hardness, compared with diamond, are more outstanding
Great effort has been made in synthesis of this material, in most cases amorphous carbon nitrogen films instead of crystalline C3N4 were obtained
In the past three decades, diamond-like carbon films incorporated with nitrogen or called CNx films have been extensively studied owing to their potential application as cold cathode materials in field emission displays (FED)
Summary
In the 1989, Liu and Cohen [1, 2] theoretically predicted the structure and physical properties of β-C3N4 whose bulk modulus and hardness, compared with diamond, are more outstanding. Great effort has been made in synthesis of this material, in most cases amorphous carbon nitrogen (aCNx) films instead of crystalline C3N4 were obtained. Either crystalline C3N4 or a-CNx films have excellent performance. Studies have shown that carbon nitrogen (CNx) films have excellent properties in terms of high hardness [3], wear resistance [4], hydrogen storage performance [5], and excellent field emission properties [6]. In the past three decades, diamond-like carbon films incorporated with nitrogen or called CNx films have been extensively studied owing to their potential application as cold cathode materials in field emission displays (FED). The structures and synthesis methods of CNx films are diverse, so they have attracted much attention
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