論文

査読有り 国際誌
2021年9月8日

Luminescence Fine Structures in Single Lead Halide Perovskite Nanocrystals: Size Dependence of the Exciton-Phonon Coupling.

Nano Letters
  • Kenichi Cho
  • ,
  • Takumi Yamada
  • ,
  • Hirokazu Tahara
  • ,
  • Terumasa Tadano
  • ,
  • Hidekatsu Suzuura
  • ,
  • Masaki Saruyama
  • ,
  • Ryota Sato
  • ,
  • Toshiharu Teranishi
  • ,
  • Yoshihiko Kanemitsu

21
17
開始ページ
7206
終了ページ
7212
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.nanolett.1c02122

Lead halide perovskite nanocrystals (NCs) have superior photoluminescence (PL) properties, such as high PL quantum yields and wide PL wavelength tunability, for optoelectronic applications. Here, we report the PL spectra of single formamidinium lead halide perovskite FAPbX3 (X = Br, I) NCs examined by single-dot spectroscopy at low temperature. We found four PL peaks in the low-energy region below the strong exciton PL peak that originate from two longitudinal-optical (LO) phonon replicas of the exciton PL, biexcitons, and charged excitons (trions). The binding energies of the biexcitons and trions become larger as the NCs decrease in size. The LO phonon energies show no size dependence, but the Huang-Rhys factors, which reflect the strength of the exciton-phonon coupling, become larger for smaller NCs. Our findings provide important insights into the exciton properties of perovskite NCs.

リンク情報
DOI
https://doi.org/10.1021/acs.nanolett.1c02122
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/34415169
ID情報
  • DOI : 10.1021/acs.nanolett.1c02122
  • PubMed ID : 34415169

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