[10a-Z11-1~11] 12.5 Organic solar cells

[10a-Z11-8] Practical Light Trapping Structures for Thin-Film Organic Photovoltaics Fabricated by Nanoimprint Lithography

〇Shigeru Kubota¹, Kenta Hiraga¹, Kensaku Kanomata¹, Bashir Ahmmad¹, Jun Mizuno², Fumihiko Hirose¹ (1.Yamagata Univ., 2.Waseda Univ.)

Keywords:light trapping, moth eye structure

We develop a light trapping technique using surface nanostructures (moth eye structures) to improve the power conversion efficiency of organic photovoltaics. First, we conduct FDTD optical simulation to find the optimal geometry of moth eye pattern for increasing the photocurrent level. Next, we experimentally fabricate the near-optimal moth eye structure by using nanoimprint lithography, and apply it to the surface of organic photovoltaics to verify the improvement of efficiency.