Title |
Hybrid Graphene and Graphitic Carbon Nitride Nanocomposite: Gap Opening, Electron–Hole Puddle, Interfacial Charge Transfer, and Enhanced Visible Light Response
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Published in |
Journal of the American Chemical Society, February 2012
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DOI | 10.1021/ja211637p |
Pubmed ID | |
Authors |
Aijun Du, Stefano Sanvito, Zhen Li, Dawei Wang, Yan Jiao, Ting Liao, Qiao Sun, Yun Hau Ng, Zhonghua Zhu, Rose Amal, Sean C. Smith |
Abstract |
Opening up a band gap and finding a suitable substrate material are two big challenges for building graphene-based nanodevices. Using state-of-the-art hybrid density functional theory incorporating long-range dispersion corrections, we investigate the interface between optically active graphitic carbon nitride (g-C(3)N(4)) and electronically active graphene. We find an inhomogeneous planar substrate (g-C(3)N(4)) promotes electron-rich and hole-rich regions, i.e., forming a well-defined electron-hole puddle, on the supported graphene layer. The composite displays significant charge transfer from graphene to the g-C(3)N(4) substrate, which alters the electronic properties of both components. In particular, the strong electronic coupling at the graphene/g-C(3)N(4) interface opens a 70 meV gap in g-C(3)N(4)-supported graphene, a feature that can potentially allow overcoming the graphene's band gap hurdle in constructing field effect transistors. Additionally, the 2-D planar structure of g-C(3)N(4) is free of dangling bonds, providing an ideal substrate for graphene to sit on. Furthermore, when compared to a pure g-C(3)N(4) monolayer, the hybrid graphene/g-C(3)N(4) complex displays an enhanced optical absorption in the visible region, a promising feature for novel photovoltaic and photocatalytic applications. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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China | 3 | 1% |
Korea, Republic of | 1 | <1% |
Australia | 1 | <1% |
France | 1 | <1% |
Singapore | 1 | <1% |
Czechia | 1 | <1% |
Iran, Islamic Republic of | 1 | <1% |
United States | 1 | <1% |
Unknown | 251 | 96% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 67 | 26% |
Researcher | 39 | 15% |
Student > Master | 35 | 13% |
Student > Doctoral Student | 21 | 8% |
Student > Bachelor | 11 | 4% |
Other | 37 | 14% |
Unknown | 51 | 20% |
Readers by discipline | Count | As % |
---|---|---|
Chemistry | 85 | 33% |
Materials Science | 44 | 17% |
Physics and Astronomy | 30 | 11% |
Chemical Engineering | 17 | 7% |
Engineering | 11 | 4% |
Other | 14 | 5% |
Unknown | 60 | 23% |