AI Article Synopsis

  • Research investigates perovskite solar cells (PSCs) made in air, revealing challenges due to their sensitivity to moisture affecting performance compared to inert environments.
  • The study shows that moisture stabilizes temporary phases during crystallization, leading to less efficient perovskite crystal formation, but thermal radiation can speed up this process to create high-quality films in just 10 seconds.
  • Successfully applying these improvements results in a record power conversion efficiency of 20.8% for PSCs processed in challenging high humidity conditions, indicating significant advancements in eco-friendly solar technology production.

Article Abstract

Fabricating perovskite solar cells (PSCs) in air is conducive to low-cost commercial production; nevertheless, it is rather difficult to achieve comparable device performance as that in an inert atmosphere because of the poor moisture toleration of perovskite materials. Here, the perovskite crystallization process is systematically studied using two-step sequential solution deposition in an inert atmosphere (glovebox) and air. It is found that moisture can stabilize solvation intermediates and prevent their conversion into perovskite crystals. To address this issue, thermal radiation is used to accelerate perovskite crystallization for integrated perovskite films within 10 s in air. The as-formed perovskite films are compact, highly oriented with giant grain size, superior photoelectric properties, and low trap density. When the films are applied to PSC devices, a champion power conversion efficiency (PCE) of 20.8% is obtained, one of the best results for air-processed inverted PSCs under high relative humidity (60 ± 10%). This work substantially assists understanding and modulation to perovskite crystallization kinetics under heavy humidity. Also, the ultrafast conversion strategy by thermal radiation provides unprecedented opportunities to manufacture high-quality perovskite films for low-temperature, eco-friendly, and air-processed efficient inverted PSCs.

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http://dx.doi.org/10.1002/adma.202205143DOI Listing

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