Potassium Thiocyanate-Assisted Enhancement of Slot-Die-Coated Perovskite Films for High-Performance Solar Cells
Subbiah, Anand Selvin
Harrison, George T.
Isikgor, Furkan Halis
de Bastiani, Michele
De Wolf, Stefaan
KAUST DepartmentKAUST Solar Center (KSC)
Material Science and Engineering
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/667324
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AbstractSlot-die coating is highly promising for scaled deposition of metal halide perovskite thin films. However, the power conversion efficiencies (PCEs) of slot-die-prepared perovskite solar cells (PSCs) still lag behind their spin-casted counterparts. To resolve this issue, the crystal size and quality of slot-die-coated methylammonium lead triiodide (MAPbI3) perovskite films are dramatically improved via additive engineering using potassium thiocyanate (KSCN). The modified micrometer-thick films have an average grain size of ≈11 μm and charge-carrier parameters that are comparable with single-crystal perovskites, such as a 1.89 μs lifetime, 136.65 ± 31.52 cm2 V−1 s−1 mobility, and 25.15 ± 3.55 μm diffusion length. Exploiting these enhanced properties, planar inverted PSCs with negligible hysteresis are fabricated and an average and a maximum PCE of 20.14% and 21.38%, respectively, are achieved which are among the highest reported values for slot-die-coated PSCs. Notably, our devices have a narrow PCE distribution along the slot-die coating axis, highlighting slot-die coating's promise to fabricate large-scale, high-performance PSCs.
CitationXu, F., Liu, J., Subbiah, A. S., Liu, W., Kang, J., Harrison, G. T., … De Wolf, S. (2021). Potassium Thiocyanate-Assisted Enhancement of Slot-Die-Coated Perovskite Films for High-Performance Solar Cells. Small Science, 2000044. doi:10.1002/smsc.202000044
SponsorsF.X. and J.L. contributed equally to this work. This work was supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award nos.: OSR-2019-CARF/CCF-3097 and OSR-2019-CRG-4093
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