Details

Autor(en) / Beteiligte

• Hou, Enlong
• Chen, Jingfu
• Luo, Jiefeng
• Fan, Yuteng
• Sun, Chao
• Ding, Yu
• Xu, Peng
• Zhang, Hui
• Cheng, Shuo
• Zhao, Xinjing
• Xie, Liqiang
• Yan, Jiawei
• Tian, Chengbo
• Wei, Zhanhua

Titel

Cross‐Linkable Fullerene Enables Elastic and Conductive Grain Boundaries for Efficient and Wearable Tin‐Based Perovskite Solar Cells

Ist Teil von

• Angewandte Chemie International Edition, 2024-05, Vol.63 (20), p.e202402775-n/a

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Tin‐based perovskite solar cells (TPSCs) have received increasing attention due to their low toxicity, high theoretical efficiency, and potential applications as wearable devices. However, the inherent fast and uncontrollable crystallization process of tin‐based perovskites results in high defect density in the film. Meanwhile, when fabricated into flexible devices, the prepared perovskite film exhibits inevitable brittleness and high Young's modulus, seriously weakening the mechanical stability. In this work, we design and synthesize a cross‐linkable fullerene, thioctic acid functionalized C60 fulleropyrrolidinium iodide (FTAI), which has multiple interactions with perovskite components and can finely regulate the crystallization quality of perovskite film. The obtained perovskite film shows an increased grain size and a more matched energy level with the electron transport material, effectively improving the carrier extraction efficiency. The FTAI‐based rigid device achieves a champion efficiency of 14.91 % with enhanced stability. More importantly, the FTAI located at the perovskite grain boundaries could spontaneously cross‐link during the perovskite annealing process, which effectively improves the conductivity and elasticity of grain boundaries, thereby giving the film excellent bending resistance. Finally, the FTAI‐based wearable device yields a record efficiency of 12.35 % and displays robust bending durability, retaining about 90 % of the initial efficiency after 10,000 bending times. A cross‐linkable fullerene (FTAI) is applied to regulate grain boundary conductivity and elasticity for the tin‐based perovskite. The introduction of FTAI not only improves the perovskite quality, passivates the grain boundary defects, and facilitates charge transfer, but also effectively enhances the mechanical stability of perovskite film, achieving high‐performance rigid and wearable tin‐based perovskite solar cells.