[21p-E101-1~6] 12.5 Organic solar cells

[21p-E101-5] Discussion on Photovoltaic Mechanisms of Organic Semiconductor Solar Cells

〇Kazuo Narushima¹, Junnosuke Nakamura¹, Shouki Miyata¹ (1.National Inst. Technol., Ube College)

Keywords:Organic Semiconductor Solar Cells, Quantum Chemistry, Photovoltaic Mechanisms

We have studied photovoltaic mechanisms of an organic solar cell using phthalocyanine for a p-type semiconductor and fullerene C₆₀ for an n-type semiconductor in quantum chemistry simulation, for example. Some double bonds in unimolecular phthalocyanine become semi-double bonds in the bimolecular system. Furthermore, some carbon atoms in a fullerene molecule are negatively charged in the bimolecular system. These results suggest the generation of positive holes and conduction electrons in the bimolecular system. These positive holes and conduction electrons in the ground state facilitate the migration of positive holes and conduction electrons generated in a photoactive layer by light irradiation.