Evolution of the band-gap and optical properties of graphene oxide with controllable reduction level

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• 作者：Yan Shen ; Songbo Yang ; Peng Zhou ; Qingqing Sun ; Pengfei Wang ; Li Wan ; Jing Li ; Liangyao Chen ; Xianbao Wang ; Shijin Ding ; David Wei Zhang
• 刊名：Carbon
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：62
• 期：Complete
• 页码：157-164
• 全文大小：1968 K

文摘

The dependence of the absorbance of few-layer graphene oxide on reduction level is shown to originate from different inter- and intra-band transitions using infrared-visible spectroscopy. In addition, the band-gap of reduced graphene oxide is tunable from 2 to 0.02 eV depending on its reduction level. These results indicate that reduced graphene oxide possesses great potential as a candidate for photodetection in the mid-infrared range by controlling its band-gap. This study not only gives further insight into the absorption mechanism of graphene oxide reduced to different levels, but also reveals a way to tune and measure the band-gap of graphene-based materials using a simple, economical, and nondestructive approach. This approach should be readily adapted for use in photodetection applications.