[7p-S102-1~6] Perovskite, Compounds, and Silicon: Current Status and Future Prospects of Tandem Solar Cells

1:30 PM - 2:00 PM JST(4:30 AM - 5:00 AM UTC)

[7p-S102-2] Cu₂O/Si Tandem Solar cells

〇Soichiro Shibasaki¹, Takashi Yamamoto¹, Sara Yoshio¹, Kanta Sugimoto¹, Atsushi Wada¹, Yuya Honishi¹, Naoyuki Nakagawa¹, Yukitami Mizuno¹, Motohiro Toyota¹, Junji Sano¹, Yasutaka Nishida¹, Kazushige Yamamoto¹ (1.Toshiba Corporation)

Keywords:

cuprous oxide,tandem solar cells

We are developing a four-terminal Cu₂O/Si tandem solar cell with over 30% efficiency and high reliability for electric mobility applications. Cu₂O is composed of abundant copper and oxygen, and is expected to have high durability. We reported an efficiency of 10.5% with a small Cu₂O cell and demonstrated 9.3% efficiency at a practical size. The Cu₂O/Si tandem solar cell achieved an efficiency of 26.1%, but improvements are needed to reach the target of 30%. We are working on efficiency improvements, focusing on the Cu₂O top cell, which has significant room for improvement.