Nature Communications (Jan 2017)

Acoustic-optical phonon up-conversion and hot-phonon bottleneck in lead-halide perovskites

  • Jianfeng Yang,
  • Xiaoming Wen,
  • Hongze Xia,
  • Rui Sheng,
  • Qingshan Ma,
  • Jincheol Kim,
  • Patrick Tapping,
  • Takaaki Harada,
  • Tak W. Kee,
  • Fuzhi Huang,
  • Yi-Bing Cheng,
  • Martin Green,
  • Anita Ho-Baillie,
  • Shujuan Huang,
  • Santosh Shrestha,
  • Robert Patterson,
  • Gavin Conibeer

DOI
https://doi.org/10.1038/ncomms14120
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 9

Abstract

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Slow cooling of hot charge carriers in lead halide perovskite could be used in photovoltaics devices. Here, Yanget al. study hot carrier dynamics by transient absorption spectroscopy. They relate the phonon bottleneck to the up-conversion of low-energy phonons, facilitated by the presence of organic cations.