Photofunctional Organic Chemistry Laboratory
|Staff & Contact|
|Educational Staff||Prof. Hiroko Yamada
Associate Prof. Naoki Aratani
Assistant Prof. Mitsuharu Suzuki ,Hironobu Hayashi
Education and Research Activities in the Laboratory
The Photofunctional Organic Chemistry Laboratory was established on January 1, 2011.
We focus on the development of functional organic materials including organic semiconductors for photovoltaic cells and organic thin-film transistors, highly fluorescent dyes, etc. on the basis of organic synthesis. In particular, acenes and porphyrinoids are our current target compounds. Students at our laboratory are encouraged to work independently and freely on their own original research themes.
We are trying to engineer well-performing organic semiconducting thin films for use in electronic devices such as organic solar cells. To this end, we employ a unique deposition technique called “precursor approach” (Fig. 1), and are preparing new compounds—typically derivatives of acenes and benzoporphyrin—that can be processed by this method (Fig. 2). We have been conducting joint research “3D Active-Site Science” (JSPS Grant-in-Aid for Scientific Research on Innovative Areas).
We are investigating the surface-assisted graphene nanoribbon (GNR) synthesis that allows width, edge structure, and heteroatom incorporation to be modulated with atomic-level precision (Fig. 3). Our group is currently involved in, among others, collaborative projects of “Tailor-Made Synthesis of Graphene Nanoribbons for Innovative Devices” (JST CREST).
We have created various novel functional polycyclic aromatic hydrocarbons (PAHs). These compounds have near-infrared absorption properties, intensive light emission, or remarkable redox properties (Fig. 4). We have also been attempting to make porous crystalline materials.
Explanatory Pictures of Research Activities
- Fig. 1 A photoprecursor method for solution-processing of organic thin-film devices
- Fig. 2 Photo-irradiation process on making of organic thin-film devices
- Fig. 3 On-surface Synthesis of Graphene Nanoribbon
- Fig. 4. Novel functional PAH
Recent Research Papers and Achievements
1. K.Takahashi, M. Suzuki, K. Nakayama, H. Yamada et al., Side-chain engineering in a thermal precursor approach for efficient photocurrent generation, J. Mater. Chem. A, 2017, 5, 14003. (Selected as an Inside Front Cover)
2. M. Suzuki, Y. Yamaguchi, K. Takahashi, K. Takahira, T. Koganezawa, S. Masuo, K.-i. Nakayama, H. Yamada, Photoprecursor Approach Enables Preparation of Well-Performing Bulk-Heterojunction Layers Comprising a Highly Aggregating Molecular Semiconductor, ACS Appl. Mater. Interfaces, 2016, 8, 8644.
3. H.Hayashi, J. Yamaguchi, H. Jippo, R. Hayashi, N. Aratani, M. Ohfuchi, S. Sato, and H. Yamada, Experimental and Theoretical Investigations of Surface-Assisted Graphene Nanoribbon Synthesis Featuring Carbon–Fluorine Bond Cleavage, ACS Nano, 2017, 11, 6204.
4. A. Matsumoto, M. Suzuki, D. Kuzuhara, H. Hayashi, N. Aratani, H. Yamada, Tetrabenzoperipentacene: Stable Five-Electron Donating Ability and a Discrete Triple-Layered -Graphite Form in the Solid State, Angew. Chem. Int. Ed., 2015, 54, 8175.(Selected as a Hot paper)