Su Da Angew: Volatile perovskite ink can quickly scrape-coat pure-phase FAPbI3 perovskite energy cells and components in the ambient atmosphere

• Although perovskite photovoltaics have achieved great success in terms of device efficiency and stability using laboratory-scale spin-coating methods, there is a need for high-throughput and cost-effective solutions due to the complexity of perovskite crystallization. It remains unresolved and rarely reported.

  
  

  Suzhou University Yang Fu and Li Yaowen et al.A stable precursor ink design strategy is proposed to control solvent volatilization and perovskite crystallization, thereby achieving wide speed window printing of phase-pure FAPbI3 perovskite solar cells (pero-SC) in the environment (0.3 to 18.0 m/ min) atmosphere. FAPbI3 perovskite precursor ink uses volatile acetonitrile (ACN) as the main solvent, and DMF and DMSO as coordination additives, which is beneficial to improving the stability of the ink, suppressing coffee rings and complex intermediate FAPbI3 phases, and providing high-quality pinhole-free and pure-phase FAPbI3 perovskite films with large-scale uniformity.

  
  

  Finally, the small-area FAPbI3 pero-SC (0.062 cm2) and large-area components (15.64 cm2) achieved significant efficiencies of 24.32% and 21.90%, respectively, and when the printing speed was accelerated, the PCE of the device could be maintained at 23.76%. Increase to 18.0 m/min. Specifically, the unpackaged device showed excellent operational stability, with a T90 of over 1350 hours. This work represents a step toward scalable, cost-effective high-performance and high-yield perovskite photovoltaic manufacturing.

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• Yuan, Linhao, Chen, Xining, Guo, Xianming, Huang, Shihao, Wu, Xiaoxiao, Shen, Yunxiu, Gu, Hao, Chen, Yujin, Zeng, Guixiang, Egelhaaf, Hans-Joachim, Brabec, Christoph J., Yang, Fu, Li, Yaowen, Li, Yongfang, Angew. Chem. Int. Ed. 2023, e202316954.

  
  

  https://onlinelibrary.wiley.com/doi/10.1002/anie.202316954