The 199th Special MMU seminar
SPINODAL NANOTECHNOLOGY: Computational Nano-materials Design of High-efficiency Photovoltaic Solar Cells
Prof. Hiroshi Katayama-Yoshida
Osaka University, Japan
Date: September 17th (Wed), 2014
Time: 13:30 - 14:30
Place: 8th floor medium seminar room (Room 811-812), Sengen
Spinodal nanotechnology becomes important as a new class of bottom-up nanotechnology in order to fabricate the nano-superstructures
by the self-organization. Based on ab initio electronic structure calculation and multi-scale simulation for the thermal non-equilibrium crystal growth, we discuss
the self-organized spinodal nano-decomposition for the application of high-efficiency photovoltaic solar-cells, such as Zinc blende Cd(Te,S), Cd(Te,Se), Chalcopyrite
CuInSe2, Cu(In,Ga)Se2, Kesterite Cu2ZnSn(S,Se)4, Perovskite CsSn(I,Br)3 and CsSn(I,Cl)3.
By controlling the dimensionality (2D and 3D) in the crystal growth, crystal
growth speed, and seeding in the spinidal nano-decomposition, we can grow shape-controlled quantum-dot (Dairiseki-Phase) and quantum nano-wire (Konbu-Phase).
New functionalities by spinodal nano-decomposition, such as the fast electron-hole separation in nano-scale Type-II semiconductors, and multi-exciton formation
in photovoltaic solar-cells can be realized based on the spinodal nanotechnology. We compare our recent computational nano-materials design data with the recently
available experimental data.