Solution-processed CsPbBr 3 films typically exhibit significant surface defects and high roughness, leading to large open-circuit voltage ( V OC ) loss and relatively poor efficiency in solar cells. Thus, an effective surface treatment method is highly anticipated to enhance both film quality and device performance.
Here, we propose and demonstrate an efficient, scalable strategy for water-mist-induced surface reconstruction of CsPbBr 3 films, utilizing a low-cost, vacuum-free mist chemical vapor deposition system. After optimization at 275 ℃ for 30 min, the mist-treated CsPbBr 3 films present the purest perovskite phase, lowest surface roughness, higher light absorption, and longer carrier lifetime. Corresponding carbon based solar cells delivered a champion efficiency of 10.06%, with the V OC of 1.50 V, along with improved repeatability and stability.
This work provides a new approach to direct the role of water during perovskite formation and paves the way to further break the efficiency bottleneck of CsPbBr 3 perovskite solar cells. The work titled “ Mist-water-induced surface reconstruction for efficient carbon-based inorganic CsPbBr 3 perovskite solar cells ”, was published on Acta Physico-Chimica Sinica (published on Dec. 16, 2025).
Acta Physico-Chimica Sinica
Experimental study
Not applicable
Mist-water-induced surface reconstruction for efficient carbon-based inorganic CsPbBr3 perovskite solar cells
16-Dec-2025