Optimization of Coating Parameters for Enabling Homogeneous Perovskite Thin Films via Upscalable Hybrid Evaporation-Slot-Die Coating Deposition Route - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2022

Optimization of Coating Parameters for Enabling Homogeneous Perovskite Thin Films via Upscalable Hybrid Evaporation-Slot-Die Coating Deposition Route

Résumé

We report the use of slot-die coating as an up-scalable technique to convert a co-evaporated CsBr/PbI2 precursor layer into a triple-cation mixed halide perovskite. We optimize this two-step deposition process by varying the coating parameters such as the evaporation rates in the first step and the solution concentration and dispense rates in the second step. We observe that the co-evaporation of CsBr and PbI2 at 0.1 A s-1 and 1.0 A s-1, respectively, results in a porous layer which is desired for the conversion by slot-die coating. In the second step, with an optimization of solution concentration (40.7 mg/mL) and solution dispense rate (3.3 µL s-1), uniform perovskite film with large grain size on the 5 x 5 cm² substrates is achieved. The homogeneity, composition and stoichiometry of the converted perovskite film were studied using X-ray Photoelectron Spectroscopy (XPS), from surface to bulk, using in depth profiling by sequential Ar+ sputtering. The perovskite layer has been implemented into a single-junction device, yielding a champion efficiency of 13.5% power conversion efficiency with hysteresis (average 10 - 11%), which is the first cell efficiency obtained using this hybrid deposition method based on the dual-source CsBr/PbI2 thermal evaporation and slot-die coating.
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Dates et versions

hal-04433387 , version 1 (01-02-2024)

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van Son Nguyen, Elisa Grépin, Pia Dally, Iwan Zimmermann, Elise Bruhat, et al.. Optimization of Coating Parameters for Enabling Homogeneous Perovskite Thin Films via Upscalable Hybrid Evaporation-Slot-Die Coating Deposition Route. 8th World Conference on Photovoltaic Energy Conversion (WCPEC 8), Sep 2022, Milan, Italy. WIP, 2022, ⟨10.4229/WCPEC-82022-2AV.1.20⟩. ⟨hal-04433387⟩
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