[17p-D101-1~12] Recent progress of crystalline silicon solar cells for terawatt power generation

[17p-D101-8] Toward high-efficiency c-Si cells with very thin free-standing wafers

〇Hitoshi Sai¹, Takuya Matsui¹, Shota Nunomura¹, Hiroshi Umishio^1,2, Tomoyuki Kawatsu³, Hidetaka Takato¹, Koji Matsubara¹ (1.AIST, 2.Tsukuba U., 3.Komatsu NTC Ltd.)

Keywords:semiconductor, solar cell, silicon

Using thinner wafers is one of the attractive options to reduce the cost and expand the market of c-Si solar cells. In fact, it is expected that high-efficiency c-Si cells can be realized even with very thin wafers below 30 um, according to the theoretical simulations. However, the potential of such thin c-Si solar cells has not been confirmed in experiment yet. In this study, we attempt to examine the potential of high-efficiency c-Si cells with very thin free-standing wafers, by using a-Si:H/c-Si heterojunction solar cell configuration.