Fabrication of Compact and Stable Perovskite Films with Optimized Precursor Composition in the Fast-Growing Procedure

Kai Zhu, Tanghao Liu, Yuanyuan Zhou, Qin Hu, Ke Chen, Yifei Zhang, Wenqiang Yang, Jiang Wu, Fengjun Ye, Deying Luo, Nitin Padture, Feng Liu, Thomas Russell, Rui Zhu, Qihuang Gong

Research output: Contribution to journalArticlepeer-review

11 Scopus Citations


The fast-growing procedure (FGP) provides a simple, high-yield and lead (Pb)-release free method to prepare perovskite films. In the FGP, the ultra-dilute perovskite precursor solution is drop-cast onto a hot (~240°C) substrate, where a perovskite film grows immediately accompanied by the rapid evaporation of the host solvent. In this process, all the raw materials in the precursor solution are deposited into the final perovskite film. The potential pollution caused by Pb can be significantly reduced. Properties of the FGP-processed perovskite films can be modulated by the precursor composition. While CH3NH3Cl (MACl) affects the crystallization process and leads to full surface coverage, CH(NH2)2I (FAI) enhances the thermal stability of the film. Based on the optimized precursor composition of PbI2·(1−x)FAI·xMACl, x=0.75, FGP-processed planar heterojunction perovskite solar cells exhibit power conversion efficiencies (PCEs) exceeding 15% with suppressed hysteresis and excellent reproducibility.

Original languageAmerican English
Pages (from-to)608-616
Number of pages9
JournalScience China Materials
Issue number7
StatePublished - 2017

Bibliographical note

Publisher Copyright:
© 2017, Science China Press and Springer-Verlag GmbH Germany.

NREL Publication Number

  • NREL/JA-5900-71265


  • fast-growing procedure
  • lead-release free
  • precursor composition
  • surface coverage
  • thermal stability


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