Spray-coated SnO₂ electron transport layer with high uniformity for planar perovskite solar cells

Abstract

SnO₂ has been proven to be an effective electron transport layer (ETL) material for perovskite solar cells (PSCs) owing to its excellent electrical and optical properties. Here, we introduce a viable spray coating method for the preparation of SnO₂ films. Then, we employ a SnO₂ film prepared using the spray coating method as an ETL for PSCs. The PSC based on the spray-coated SnO₂ ETL achieves a power conversion efficiency of 17.78%, which is comparable to that of PSCs based on conventional spin-coated SnO₂ films. The large-area SnO₂ films prepared by spray coating exhibit good repeatability for device performance. This study shows that SnO₂ films prepared by spray coating can be applied as ETLs for stable and high-efficiency PSCs. Because the proposed method involves low material consumption, it enables the low-cost and large-scale production of PSCs.

Graphical abstract

Keywords

spray coating / SnO₂ film / ETL / PSCs

References

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Acknowledgements

The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (Grants No. 11974129) to Xiao-Feng Wang and the Fundamental Research Funds for the Central Universities, Jilin University.

Electronic Supplementary Material

Supplementary material is available in the online version of this article at https://doi.org/10.1007/s11705-020-1917-x and is accessible for authorized users.

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