Temperature-dependent evolution of Raman spectra of methylammonium lead halide perovskites, CH3NH3PbX3 (X = I, Br)

Kousuke Nakada, Yuki Matsumoto, Yukihiro Shimoi, Koji Yamada, Yukio Furukawa*


研究成果: Article査読

31 被引用数 (Scopus)


We present a Raman study on the phase transitions of organic/inorganic hybrid perovskite materials, CH3NH3PbX3 (X = I, Br), which are used as solar cells with high power conversion efficiency. The temperature dependence of the Raman bands of CH3NH3PbX3 (X = I, Br) was measured in the temperature ranges of 290 to 100 K for CH3NH3PbBr3 and 340 to 110 K for CH3NH3PbI3. Broad ν1 bands at ~326 cm1 for MAPbBr3 and at ~240 cm1 for MAPbI3 were assigned to the MA–PbX3 cage vibrations. These bands exhibited anomalous temperature dependence, which was attributable to motional narrowing originating from fast changes between the orientational states of CH3NH3+ in the cage. Phase transitions were characterized by changes in the bandwidths and peak positions of the MA–cage vibration and some bands associated with the NH3+ group.

出版ステータスPublished - 2019 2 11

ASJC Scopus subject areas

  • 分析化学
  • 化学(その他)
  • 分子医療
  • 薬科学
  • 創薬
  • 物理化学および理論化学
  • 有機化学


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