AI Article Synopsis
- We use ultrasonic spray-coating to create cesium-containing triple-cation perovskite solar cells that achieve a power-conversion efficiency of 17.8%.
- By exposing the spray-cast films briefly to low vacuum, we can control how the perovskite film crystallizes.
- The vacuum-exposed films are smoother and have more compact crystals compared to the rougher, inhomogeneous films that are not vacuum-exposed, indicating potential for scalable manufacturing of better solar cells.
Article Abstract
We use ultrasonic spray-coating to fabricate cesium-containing triple-cation perovskite solar cells with a power-conversion efficiency of up to 17.8%. Our fabrication route involves a brief exposure of the partially wet spray-cast films to a low vacuum, a process that is used to control film crystallization. We show that films that are not vacuum-exposed are relatively rough and inhomogeneous, while vacuum-exposed films are smooth and consist of small and densely packed perovskite crystals. The process techniques developed here represent a step toward a scalable and industrially compatible manufacturing process capable of creating stable and high-performance perovskite solar cells.
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| http://dx.doi.org/10.1021/acsami.8b14859 | DOI Listing |
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