Potassium Thiocyanate-Assisted Enhancement of Slot-Die-Coated Perovskite Films for High-Performance Solar Cells

Fuzong Xu, Jiang Liu, Anand Selvin Subbiah, Wenzhu Liu, Jingxuan Kang, George T. Harrison, Xinbo Yang, Furkan Halis Isikgor, Erkan Aydin, Michele de Bastiani, Stefaan De Wolf

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Slot-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.
Original languageEnglish (US)
Pages (from-to)2000044
JournalSmall Science
StatePublished - Feb 7 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-02-11
Acknowledged KAUST grant number(s): OSR-2019-CARF/CCF-3097, OSR-2019-CRG-4093
Acknowledgements: F.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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