Distinctive spectroscopic characteristics observed in colloidal perovskite cspbbr3 quantum dot

Sangeun Cho, Sam Kyu Noh, Hyungsang Kim, Hyunsik Im

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Abstract

Distinctive spectroscopic characteristics are observed in colloidal perovskite CsPbBr3 quantum dot (QD) dispersed in octane doped with PPO. As the content of CsPbBr3-QD increases, the emission and the absorption energies decrease due to QD-cluster formed in case of the inter-QD distance smaller than diameter of QD. Spectroscopic evidences supporting QD-cluster are found in the Urbach energy and the carrier lifetime. Unusual absorption lines showing explicit QD dependence are observed in Fourier-transform infrared spectra, which is explained by vibrational modes of bound PPO hybridized with CsPbBr3-QD.

Original languageEnglish
Pages (from-to)107-110
Number of pages4
JournalJournal of the Korean Vacuum Society
Volume30
Issue number4
DOIs
StatePublished - Jul 2021

Keywords

  • Absorption
  • CsPbBr
  • Fourier-transform infrared spectroscopy
  • Perovskite
  • Quantum dot
  • Time-resolved photoluminescence

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