In Situ Probing the Crystallization Kinetics in Gas-Quenching-Assisted Coating of Perovskite Films

Qiu S, Majewski M, Dong L, Jang D, Le Corre VM, García Cerrillo J, Ronsin OJ, Yang F, Guo F, Zhang K, Lüer L, Harting J, Du T, Brabec C, Egelhaaf HJ (2024)

Publication Type: Journal article

Publication year: 2024

Journal

DOI: 10.1002/aenm.202303210

Abstract

The pursuit of commercializing perovskite photovoltaics is driving the development of various scalable perovskite crystallization techniques. Among them, gas quenching is a promising crystallization approach for high-throughput deposition of perovskite films. However, the perovskite films prepared by gas-quenching assisted blade coating are susceptible to the formation of pinholes and frequently show inferior crystallinity if the interplay between film coating, film drying, and crystallization kinetics is not fully optimized. That arguably requires a thorough understanding of how single processing steps influence the crystallization kinetics of printed perovskite films. Here, in situ optical spectroscopies are integrated into a doctor-blading setup that allows to real-time monitor film formation during the gas-quenching process. It is found that the essential role of gas quenching treatment is in achieving a smooth and compact perovskite film by controlling the nucleation rate. Moreover, with the assistance of phase-field simulations, the role of excessive methylammonium iodide is revealed to increase grain size by accelerating the crystal growth rate. These results show a tailored control of crystal growth rate is critical to achieving optimal film quality, leading to fully printed solar cells with a champion power conversion efficiency of 19.50% and mini solar modules with 15.28% efficiency are achieved.

Authors with CRIS profile

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) Germany (DE) Soochow University, Suzhou / 苏州大学 China (CN) Jinan University China (CN)

How to cite

APA:

Qiu, S., Majewski, M., Dong, L., Jang, D., Le Corre, V.M., García Cerrillo, J.,... Egelhaaf, H.-J. (2024). In Situ Probing the Crystallization Kinetics in Gas-Quenching-Assisted Coating of Perovskite Films. Advanced Energy Materials. https://doi.org/10.1002/aenm.202303210

MLA:

Qiu, Shudi, et al. "In Situ Probing the Crystallization Kinetics in Gas-Quenching-Assisted Coating of Perovskite Films." Advanced Energy Materials (2024).

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