[19p-PB10-1~22] 13.9 Compound solar cells

[19p-PB10-2] New Asymmetric Waveguide-coupled Concentrator Solar-cells and Periodic Parabolic Mirrors with Tapered Waveguide coupled with Si-based Solar Cells

〇Akira Ishibashi¹, Yuto Ohkura¹, Jiaxing Yu¹, Nobuo Sawamura¹ (1.RIES, Hokkaido Univ.)

Keywords:Concentrator Solar-cells, Asymmetric Waveguide

Investigated are asymmetric redirection waveguides, including tapered waveguide with periodic parabola mirrors, which are to couple to a solar-cell unit placed at the end, converting 3D-photons of sunlight to 2D-photons. The redirection waveguide is equipped with two functions, the first of which is to make the 3D-photons coming from various directions go vertically with respect to a 2D-waveguide. The second function is to change the vertically going photons into lateral photons propagating in the 2D waveguide. The redirection waveguide can harvest photons coming in wide area and convey them to the solar-cell unit located at the periphery of the 2D waveguide, as a key element of concentrator solar-cell with high conversion efficiencies as well as of optical wireless power transmission systems.