Crystallization Dynamics of Organolead Halide Perovskite by Real-Time X-ray Diffraction

Tetsuhiko Miyadera, Yosei Shibata, Tomoyuki Koganezawa, Takurou N. Murakami, Takeshi Sugita, Nobutaka Tanigaki, Masayuki Chikamatsu

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

We analyzed the crystallization process of the CH3NH3PbI3 perovskite by observing real-time X-ray diffraction immediately after combining a PbI2 thin film with a CH3NH3I solution. A detailed analysis of the transformation kinetics demonstrated the fractal diffusion of the CH3NH3I solution into the PbI2 film. Moreover, the perovskite crystal was found to be initially oriented based on the PbI2 crystal orientation but to gradually transition to a random orientation. The fluctuating characteristics of the crystallization process of perovskites, such as fractal penetration and orientational transformation, should be controlled to allow the fabrication of high-quality perovskite crystals. The characteristic reaction dynamics observed in this study should assist in establishing reproducible fabrication processes for perovskite solar cells.

Original languageEnglish
Pages (from-to)5630-5634
Number of pages5
JournalNano Letters
Volume15
Issue number8
DOIs
Publication statusPublished - 2015 Aug 12
Externally publishedYes

Keywords

  • anomalous diffusion
  • crystallization
  • grazing incident wide-angle X-ray scattering
  • organolead halide perovskite
  • solar cell
  • synchrotron-radiation X-ray diffraction

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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