Presentation Information
[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.