期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 23, 页码 26315-26326出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c03153
关键词
solar energy; photovoltaics; lead halide perovskites; in-situ real-time experiments; solution processing; spin coating; blade coating; crystallization; grazing incidence wide-angle X-ray scattering
资金
- National Natural Science Foundation of China [61974085]
- KAUST Office of Sponsored Research
- OSR-CARF [URF/1/3079-33-01]
- National Science Foundation [DMR-1332208]
- Canada First Research Excellence Fund (CFREF)
This study provides a systematic overview of the influence of different solution-based processing routes of lead halide perovskites on their phase transformation and conversion. The experiments reveal important information about the mechanism, kinetics, and microstructure of the thin film.
Lead halide perovskites have been of paramount interest for solution-processable solar cells, reaching power conversion efficiencies larger than 25%. In this spotlight, we will provide a systematic overview of the influence of different solution-based processing routes of lead halide perovskites on their phase transformation and conversion as revealed through in-situ X-ray-scattering experiments. These experiments were performed in conditions closely mimicking thin film processing methods and conditions used for thin film solar cell device fabrication and therefore provide critical information about the mechanism of the phase transformation, its onset, the kinetics, as well as the emergence and disappearance of various (meso)phases along the way. The measurements capture the overall solidification and conversion process of lead halide perovskite inks into solid films via so-called one-step and two-step spin-coating processes as well as blade coating and hot casting. Processing routes are applied to films based on basic components as well as mixtures of different anions and cations, solvents, and antisolvents, all of which deeply affect the thin film microstructure and morphology of the light-absorbing semiconductor and associated solar cell devices.
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