Understanding the Instability of the Halide Perovskite CsPbI$_3$ through Temperature-Dependent Structural Analysis

25 Feb 2020 Straus Daniel B. Guo Shu Abeykoon Milinda Cava Robert J.

Despite the tremendous interest in halide perovskites in solar cells, the reason that the all-inorganic perovskite CsPbI$_3$ is unstable at room temperature remains mysterious. Here single-crystal X-ray diffraction and powder pair distribution function (PDF) measurements characterize bulk perovskite CsPbI$_3$ from 100 to 295 K to elucidate its thermodynamic instability... (read more)

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  • MATERIALS SCIENCE
  • APPLIED PHYSICS