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Open Access Publications from the University of California

Intrinsic Raman signatures of pristine hybrid perovskite CH3NH3PbI3 and its multiple stages of structure transformation

  • Author(s): Chen, Q
  • Liu, H
  • Kim, HS
  • Liu, Y
  • Yang, M
  • Yue, N
  • Ren, G
  • Zhu, K
  • Liu, S
  • Park, NG
  • Zhang, Y
  • et al.

© 2016 IEEE.By performing spatially resolved Raman and photoluminescence spectroscopy with different illumination conditions, we have achieved a unified understanding towards the spectroscopy signatures of the organic-inorganic hybrid perovskite, transforming from the pristine state (CH3NH3PbI3 or MAPbI3) to fully degraded state (i.e., PbI2), for samples with varying crystalline domain size from mesoscopic scale to macroscopic size, synthesized by three different techniques.

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