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Title: Alkali additives enable efficient large area (>55 cm²) slot-die coated perovskite solar modules
Authors: Rana, Prem Jyoti Singh
Febriansyah, Benny
Koh, Teck Min
Bening Tirta Muhammad
Salim, Teddy
Hooper, Thomas J. N.
Kanwat, Anil
Ghosh, Biplab
Kajal, Priyanka
Lew, Jia Haur
Aw, Yeow Chong
Yantara, Natalia
Bruno, Annalisa
Pullarkat, Sumod A.
Ager, Joel W.
Leong, Wei Lin
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Keywords: Engineering::Materials
Issue Date: 2022
Source: Rana, P. J. S., Febriansyah, B., Koh, T. M., Bening Tirta Muhammad, Salim, T., Hooper, T. J. N., Kanwat, A., Ghosh, B., Kajal, P., Lew, J. H., Aw, Y. C., Yantara, N., Bruno, A., Pullarkat, S. A., Ager, J. W., Leong, W. L., Mhaisalkar, S. G. & Mathews, N. (2022). Alkali additives enable efficient large area (>55 cm²) slot-die coated perovskite solar modules. Advanced Functional Materials, 32(22), 2113026-.
Project: NRF2018-ITC001-001 
Solar CRP:S18-1176-SCRP
Journal: Advanced Functional Materials
Abstract: Typical fabrication methods for laboratory-scale (<1 cm2) perovskite solar cells (PSCs) are undeniably not scalable and the control of crystallization of large-area perovskite layer for commercial sized modules is also particularly challenging. Here, a seed-assisted crystallization approach is demonstrated through addition of alkali salts, CsPbBr3 and KPb2Br5, to the perovskite precursor ink for enabling homogeneous and highly crystalline large-area Cs0.15FA0.85Pb(I0.83Br0.17)3 (CsFA) perovskite films via scalable slot-die coating technique. X-ray photoelectron spectroscopy analysis reveals the segregation of potassium ions at SnO2/perovskite interface which serve as nucleation sites for the crystallization of perovskite layer. The uniformly slot-die coated CsFA films (100 cm2) from the additives containing precursor inks possess larger grains with enhanced optoelectronic properties and the corresponding devices display higher reproducibility and consistency. A champion device efficiency of 18.94% under 1 sun illumination for slot-die coated PSCs in n-type/intrinsic/p-type structure is demonstrated with improved stability with 82% of its initial efficiency tested at 65 °C for 1150 h. The slot-die coated methylammonium-free perovskite module with an active area of 57.5 cm2 shows an efficiency of 16.22% and retains 82% of its initial efficiency after 4800 h under 30% relative humidity without encapsulation.
ISSN: 1616-301X
DOI: 10.1002/adfm.202113026
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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