[6a-A204-1~10] 16.3 Bulk, thin-film and other silicon-based solar cells

[6a-A204-9] Silicon photovoltaic cells coupled with solar-pumped lasers (V)

〇Noboru Yamada¹, Tadashi Ito¹, Yasuhiko Takeda¹, Hiroshi Ito², Tomoyoshi Motohiro² (1.Toyota C. R&D Labs., 2.Nagoya Univ.)

Keywords:solar-pumped laser, light-trapping, laser power feeding

We have proposed a new photovoltaic system in which specially designed silicon photovoltaic (PV) cells are illuminated by solar-pumped lasers (SPLs) emitting at 1060 nm. To realize long-distance transmission of intense SPL via an optical fiber, we have improved the light-trapping configuration: a shortpass filter (SPF) on the front surface and a diffuse reflector on the back surface of the cell. The SPF was designed so that it transmit obliquely incident light from an optical fiber with NA = 0.2. By replacing the surface bandpass filter previously used for a space-propagating beam with the SPF, the coupling efficiency between the PV cell and fiber significantly improved.