2025-04-18 中国科学院(CAS)
＜関連情報＞
- https://english.cas.cn/newsroom/cas_media/202504/t20250421_1041578.shtml
- https://www.nature.com/articles/s41560-025-01760-6
フレキシブルなモノリシックペロブスカイト/銅(In,Ga)セリウム2タンデム太陽電池のための自己組織化単分子膜の反溶媒シーディング Antisolvent seeding of self-assembled monolayers for flexible monolithic perovskite/Cu(In,Ga)Se2 tandem solar cells
Zhiqin Ying,Shiqian Su,Xin Li,Guoxin Chen,Chongyan Lian,Dikai Lu,Meili Zhang,Xuchao Guo,Hao Tian,Yihan Sun,Linhui Liu,Chuanxiao Xiao,Yuheng Zeng,Chao Zhang,Xi Yang & Jichun Ye
Nature Energy Published:18 April 2025
DOI:https://doi.org/10.1038/s41560-025-01760-6
Abstract
Flexible perovskite/copper indium gallium selenide (CIGS) tandem solar cells hold great promise for lightweight, high-efficiency applications, yet achieving high-quality perovskite top cells on the rough surfaces of flexible CIGS bottom cells remains challenging. Accordingly, we developed an antisolvent-seeding strategy that decouples self-assembly monolayers (SAMs) adsorption from dissolution, while integrating perovskite seeding. A high-polarity solvent prevents SAMs clustering during dissolution, while a low-polarity antisolvent promotes high-density SAMs formation during adsorption. Additionally, a pre-mixed seed layer further improves perovskite wettability, crystallinity and adhesion. These advancements enable the fabrication of a 1.09-cm2 flexible monolithic perovskite/CIGS tandem with a stabilized efficiency of 24.6% (certified 23.8%), comparable to the best-performing rigid perovskite/CIGS tandems and representing one of the highest efficiencies among flexible thin-film solar cells. The flexible devices also demonstrate excellent durability, retaining over 90% of initial performance after 320 h of operation and 3,000 bending cycles at a 1-cm radius.
