[15p-E502-1~8] Research and Development Trends in Polycrystalline Thin-Film Solar Cells

[15p-E502-3] Loss Analysis and Overview of Multi-junction and Si Tandem Solar Cells

〇Masafumi Yamaguchi¹, Kyotaro Nakamura¹, Ryo Ozaki¹, Nobuaki Kojima¹, Yoshio Ohshita¹ (1.Toyota Tech. Inst.)

Keywords:solar cell, multi-junction, Si tandem

In order to creat the clean energy soceity based on renewable energies, development of high-efficiency solar cells is essential. Because efficiencies of single-junction solar cell are approacing the Shockley-Queisser limt 32-33%, multi-junction and Si tandem solar cells with efficiency potential of more than 42% as a result of effective utilization of solar spectrum are promising. This paper presents overview of high-efficiency multi-junction and Si tandem solar cels and results for loss analysis of their high-efficiency solar cells.