Photoinduced Vibrations Drive Ultrafast Structural Distortion in Lead Halide Perovskite

  title={Photoinduced Vibrations Drive Ultrafast Structural Distortion in Lead Halide Perovskite},
  author={Hong-Guang Duan and Vandana Tiwari and Ajay Jha and Golibjon R. Berdiyorov and Alexey V. Akimov and Oriol Vendrell and Pabitra K. Nayak and Henry James Snaith and Michael Thorwart and Zheng Li and Mohamed El-Amine Madjet and R. J. Dwayne Miller},
  journal={Journal of the American Chemical Society},
  pages={16569 - 16578}
The success of organic–inorganic perovskites in optoelectronics is dictated by the complex interplay between various underlying microscopic phenomena. The structural dynamics of organic cations and the inorganic sublattice after photoexcitation are hypothesized to have a direct effect on the material properties, thereby affecting the overall device performance. Here, we use ultrafast heterodyne-detected two-dimensional (2D) electronic spectroscopy to reveal impulsively excited vibrational modes… 

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