Progress of all-perovskite tandem solar cells: the role of narrow-bandgap absorbers

• Published in: Science China. Chemistry Vol. 64; no. 2; pp. 218 - 227
• Main Authors: Luo, Xinhui, Wu, Tianhao, Wang, Yanbo, Lin, Xuesong, Su, Hongzhen, Han, Qifeng, Han, Liyuan
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.02.2021; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Efficiency; Energy; Energy conversion efficiency; Energy gap; Perovskites; Photovoltaic cells; Reviews; Solar cells; tin-lead perovskite; power conversion efficiency; monolithic all-perovskite tandem solar cells
• ISSN: 1674-7291; 1869-1870
• DOI: 10.1007/s11426-020-9870-4

Perovskite solar cells (PSCs) have gained increasing attention due to their excellent photovoltaic performance, achieving certified power conversion efficiency (PCE) of 25.2%. To further enhance PCE and break the Shockley-Queisser limit of the single junction PSCs, great efforts have been made in tandem solar cells based on perovskite, including perovskite/Si, and perovskite/perovskite (all-perovskite). Among them, all-perovskite tandem solar cells exhibit unique advantages of both low-cost fabrication and high efficiency. They have advanced rapidly in these years, due to the realization of stable and efficient narrow-bandgap perovskites. In this work, we review the development of monolithic all-perovskite tandem solar cells and highlight the critical role of narrow-bandgap perovskites in recent progress of all-perovskite solar cells. We also propose our perspective of future directions on this subject.