Retarding Crystallization during Facile Single Coating of NaCl-Incorporated Precursor Solution for Efficient Large-Area Uniform Perovskite Solar Cells

Hongseuk Lee, Areum Kim, Hyeok Chan Kwon, Wooseok Yang, Yunjung Oh, Daehee Lee, Joo Ho Moon

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16 Citations (Scopus)


We demonstrated crystallization retardation of CH 3 NH 3 PbI 3 thin film during single coating of precursor solution by simple addition of NaCl. NaCl was codissolved into a precursor mixture solution containing PbI 2 and methylammonium iodide (MAI). Dissolved NaCl interacted with the PbI 2 in solution and produced a stable intermediate phase, which was converted to a full-coverage uniform perovskite absorber layer via reaction with MAI during a single spin-coating. The resulting planar-structure perovskite solar cell made from NaCl-supplemented precursor solution showed a 48% improvement in power conversion efficiency (PCE) (maximum value 15.16%) over the device fabricated without the additive. Our NaCl-supplemented single coating represents an easy approach to effectively obtain highly reproducible uniform performance at an overall position in 5 cm × 5 cm sized cells (divided into 20 subcells with an active area of 0.06 cm 2 ) with average PCEs of 12.00 ± 0.48%.

Original languageEnglish
Pages (from-to)29419-29426
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number43
Publication statusPublished - 2016 Nov 2


All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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