2022 Fiscal Year Annual Research Report
Graphitic Carbon Nitride-based Thin Films as New Functional Materials
| Project/Area Number |
22J14753
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| Allocation Type | Single-year Grants |
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| Research Institution | The University of Tokyo |
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Principal Investigator |
呉 念念 東京大学, 工学系研究科, 特別研究員(DC2)
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| Project Period (FY) |
2022-04-22 – 2024-03-31
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| Keywords | GCN / Film / CVD / mechanical properties / broad optical absorption |
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| Outline of Annual Research Achievements |
Graphitic carbon nitride (GCN) is a substance of great interest because it is composed only of carbon and nitrogen and shows a high photocatalytic activity for the splitting of water. So far, GCN materials have been obtained as powders and utilized for these purposes. If GCN materials are available in film form, what benefits one can obtain? The answer is clear considering that the science and technology of conductive polymers would not have emerged if polyacetylene was available only in the powdery form. Although films have many advantages, research on GCN films is still in the early stages. In 2016, our group reported that self-supporting GCN film samples could be obtained by vapor deposition polymerization. The GCN film showed actuation behaviors in the presence of water vapor. To tune the energy band gap of GCN films by incorporating boron, our group has developed a doping strategy for semiconductors. However, we only obtained materials with energy band gaps larger than 2.7 eV, which are insulators. To utilize visible light or sunlight, a material with a smaller energy band gap is necessary. Here I present the synthesis of carbon hybridized GCN (GCN-C) films via a two-zone chemical vapor deposition (CVD) method. The resulting GCN-C films exhibit outstanding mechanical properties, broad optical absorption, high electrical conductivity, and high on/off ratio photodetectors, making them promising materials for electronic applications. These findings represent a significant advancement in the field of GCN thin films as electronic materials.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Here I present the synthesis of carbon hybridized GCN (GCN-C) films via a two-zone chemical vapor deposition (CVD) method. The resulting GCN-C films exhibit outstanding mechanical properties, broad optical absorption, high electrical conductivity, and high on/off ratio photodetectors, making them promising materials for electronic applications. These findings represent a significant advancement in the field of GCN thin films as electronic materials.
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| Strategy for Future Research Activity |
I will finalize the manuscript and submit it soon. Later I will improve the photovoltaic performance of GCN-C films and develop other film with high mobility.
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Research Products
(1 results)
