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Fully slot-die-coated perovskite solar cells in ambient condition

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Abstract

Organic–inorganic hybrid perovskite solar cells (PSCs) are developing rapidly, but most of the PSCs are prepared by spin coating process, which is not compatible with potential large-scale, high-throughput industrialization. Slot-die coating is a promising deposition technique with high precision and excellent material utilization, which can accelerate the industrial-scale production of PSCs and enhance the potential commercial value. Herein, fully slot-die-coated PSCs were achieved by subsequently slot-die coating electron transport layer, perovskite layer and hole transport layer in ambient condition, leading to a power conversion efficiency (PCE) up to 14.55%. The optimization of slot-die coating parameters for two-step deposition process can produce even PbI2 film and subsequent high-quality perovskite film. Furthermore, a mixed solvent of dimethyl sulfoxide and N, N-dimethylformamide was used to dissolve PbI2 for further enhancing the surface energy and delaying crystallization, leading to a uniform and better perovskite film. In addition, the slot-die coating properties and repeatability could be improved by adding a small quantity of cations (cesium, methylammonium and formamidinium) additives into the PbI2 precursor solution. The results suggest that efficient PSCs with good repeatability could be processed via fully slot-die coating in ambient condition, which is compatible with potentially large-scale, roll-to-roll commercial process.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51673214) and the National Key Research and Development Program of China (2017YFA0206600).

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Authors and Affiliations

  1. School of Physics and Electronics, Central South University, Changsha, 410083, China

    Luoyi Gao, Keqing Huang, Caoyu Long, Feilong Zeng, Biao Liu & Junliang Yang

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  1. Luoyi Gao
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Correspondence to Junliang Yang.

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Gao, L., Huang, K., Long, C. et al. Fully slot-die-coated perovskite solar cells in ambient condition. Appl. Phys. A 126, 452 (2020). https://doi.org/10.1007/s00339-020-03628-w

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