[18p-B1-1~20] 13.9 Compound solar cells

6:00 PM - 6:15 PM JST(9:00 AM - 9:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[18p-B1-18] Efficiency enhancement of InGaP/GaAs/In_xGa_1-xAs//In_yGa_1-yAs four-junction solar cells by improving current mismatch

〇(M2)Takashi Shimasaki¹, Kentaroh Watanabe², Hassanet Sodabanlu², Yoshiaki Nakano¹, Masakazu Sugiyama^1,2 (1.The Univ. of Tokyohe, 2.RCAST)

Keywords:

multi-junction solar cells,III-V solar cells,current match

In this research, 4-junction solar cells were fabricated by surface activated bonding of high efficiency inverted metamorphic triple-junction solar cells (IMM3J) and high open circuit voltage InGaAs solar cells. To address the previous issue of current mismatch between IMM3J and the 4^th InGaAs, thinning of IMM3J, introducing a front hetero junction InGaAs, and optimizing the bandgap of IMM3J were attempted. As a result, current matched 4-junction solar cells were successfully achieved.