Organic Optoelectronics Laboratory

Our research in organic electronics involves three related areas:

1. Nanoscale-construction of organic semiconductors by an elecctro-spray deposition method, and their assemblies for applications in such organic electronics as organic thin-film photovoltaics.
2. Chemical synthesis and self-assembly of nanocarbon based organic semiconductor materials and enviromental-harmony ink formulation for flexible electronics.
3. Numerical simulations on the behaviors of organic semiconductor materials and their device properties in order to support the development of from meso scale to macro scale order manufacturing technologies.

As a result of these inventions, a new organic optoelectronics technology will industrialize. We aim to develop future electronics with the motto of "Integrated Scientific Literacy".

Research Subjects

• Nanoscale-construction of organic semiconductors by an elecctro-spray deposition method, and their assemblies for applications in such organic electronics as organic thin-film photovoltaics.
• Chemical synthesis and self-assembly of nanocarbon based organic semiconductor materials and ink formulation for flexible electronics.
• Numerical simulations on the behaviors of organic semiconductor materials and their device properties in order to support the development of from meso scale to macro scale order manufacturing technologies

Publications

1. Wei, W., Gu, Z., Wang, S., Zhang, Y.,Lei, Kangbin, Kase, K.:
   "Numerical simulation of the cone-jet formation and current generation inelectrostatic spray-modeling as regards space charged droplet effect"
   J. of Micromechanics and Microengineering, 23. 015004, 2013
2. Tajima, Y., Takeshi, K., Shigemitsu, Y., Numata, Y.:
   "Chemistry of Fullerene Epoxides: Synthesis, Structure and Nucleophilic Substitution-Addition Reactivity"
   Molecules, 17, 6395-6414, 2012.
3. Kimoto, A., Tajima, Y.:
   "Donor-Acceptor-Type Low Bandgap Polymer Carrying Phenylazomethine Moiety as a Metal-Collecting Pendant Unit: Open-Circuit Voltage Modulation of Solution-Processed Organic Photovoltaic Devices Induced by Metal Complexation"
   ACS Macro Letters, 1(6), 667-671, 2012
4. Kimoto, A., Tajima, Y.:
   "Donor-acceptor-Type Polymers Based on Dithieno-[2,3-b;7,6-b] -carbazole Unit for Photovoltaic Applications"
   Organic Letters, 14(9), 2282-2285, 2012.
5. Fukuda, T., Takagi, K., Asano, T., Honda, Z., Kamata, N., Shirai, H., Ju, J., Yamagata, Y., Tajima, Y.:
   "Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents"
   Japanese Journal of Applied Physics 51(2, Pt. 2), 02BK12/1-02BK12/5, 2012
6. Fukuda, T., Takagi, T., Asano, T., Honda, Z., Kamata, N., Ueno, K., Shirai, H., Ju, J., Yamagata, Y., Tajima, Y.:
   "Bulk heterojunction organic photovoltaic cell fabricated by the electrospray deposition method using mixed organic solvent"
   Phys. Status Solidi RRL, 5(7), 229- 231, 2011.
7. Wei, W.., Wang, S., Gu, Z., Fukuda, T., Kase, K., Ju, J., Yamagata Y., Tajima, Y.:
   "Numerical Simulation of Nanoparticle Pattern Fabricated by Electrostatic Spray Deposition"
   Particuology, in press
8. Luo, X., Lei, K., Gu, Z., Wang, S., Kase, K.:
   "A novel Cartesian cut cell solver for incompressible viscous flow in irregular domains"
   Intl. J. for Numerical Methods in Fluids, 67, 289-313, 2011