Antisolvent seeding of self-assembled monolayers for flexible monolithic perovskite/Cu(In,Ga)Se2 tandem solar cells

IF 49.7 1区材料科学 Q1 ENERGY & FUELS

Nature Energy Pub Date : 2025-04-18 DOI:10.1038/s41560-025-01760-6

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

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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.

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柔性单片钙钛矿/Cu(In,Ga)Se2串联太阳能电池自组装单层的抗溶剂播种

柔性钙钛矿/铜铟硒化镓（CIGS）串联太阳能电池在轻量化、高效率应用方面前景广阔，但在柔性CIGS底部电池的粗糙表面上实现高质量的钙钛矿顶部电池仍然具有挑战性。因此，我们开发了一种反溶剂播种策略，将自组装单层膜（SAMs）的吸附与溶解分离，同时整合钙钛矿播种。在溶解过程中，高极性溶剂可以防止SAMs聚集，而在吸附过程中，低极性反溶剂可以促进高密度SAMs的形成。此外，预混合种子层进一步提高了钙钛矿的润湿性、结晶性和附着力。这些进步使得1.09平方厘米的柔性单片钙钛矿/CIGS串联的制造具有24.6%的稳定效率（认证为23.8%），与性能最好的刚性钙钛矿/CIGS串联相当，代表了柔性薄膜太阳能电池中效率最高的之一。柔性器件还表现出优异的耐用性，在运行320小时和半径为1厘米的3000次弯曲循环后，仍能保持90%以上的初始性能。

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来源期刊

Nature Energy Energy-Energy Engineering and Power Technology

CiteScore

75.10

自引率

1.10%

发文量

193

期刊介绍： Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.