Abstract
Using methane as a carbon source, low-dimensional carbon nanomaterials were obtained in this work. The films were deposited directly on glass substrates by radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD). The configuration and compositions of this nanographite films were identified by X-ray photoelectron spectroscopy (XPS) as carbon in sp2 bonding form. Raman spectral characterization verified the configuration of the films to be hexatomic ring of carbon atoms. As a result, they were found to be nanographite films (NGFs). Also, the atomic force microscopy (AFM) topography and Raman spectra of different areas demonstrated the diversity of the films at the nano scale. The high light-transmitting and electron mobility indicated that the NGFs possessed excellent optic-electronic properties and could be used as good photoelectrical function materials. Furthermore, the physical and chemical growth mechanism of NGFs were analyzed by PECVD. NGFs could be obtained in a controlled process by modulating the growth conditions. In this work, the complicated transfer process commonly used for optoelectronic devices could be avoided. Also, by growing the films directly on a glass substrate, the quality degradation of the film was not a problem. This work can further promote the development of next-generation electronic or optoelectronic function materials, especially for their application in transparent conductive electrode fields.
Highlights
As one of the most intensively investigated traditional materials, carbon has a history of thousands of years
The nanographite films (NGFs) were synthesized by a 450 high-vacuum Radio frequency (RF)-plasma-enhanced chemical vapor deposition (PECVD) system
It demonstrates a polycrystalline structure of the NGFs, which is the character of carbon materials
Summary
As one of the most intensively investigated traditional materials, carbon has a history of thousands of years. A unique two-dimensional (2D) monoatomic planar membrane of carbon, has emerged as a revolutionary breakthrough in material technology Owing to their excellent transparency, electroconductivity and air stability, graphene and its related low-dimensional carbon nanomaterials have been used as transparent conductive electrodes and electron transport layer and buffer layer for photoelectric devices [7,8,9,10,11,12,13]. As reported in previous studies, carbon-related low-dimensional nanomaterials possess outstanding characteristics They showed enough strength and superior mechanical performance, excellent physical and chemical stability, high thermal conductivity, high specific surface area, excellent optical property, and good conductivity. These versatilities are very promising in a wide range of application domains, such as machinery and electronics, aerospace, photoelectric devices, energy conservation, and bio-pharmaceuticals, which made them become the rapidly rising star on the horizon of materials science
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