Giant photoluminescence blinking of perovskite nanocrystals reveals single-trap control of luminescence

Yuxi Tian, Aboma Merdasa, Maximilian Peter, Mohamed Abdellah, Kaibo Zheng, Carlito S. Ponseca, Tõnu Pullerits, Arkady Yartsev, Villy Sundström, Ivan G. Scheblykin

Research output: Contribution to journalArticlepeer-review

173 Citations (Scopus)

Abstract

Fluorescence super-resolution microscopy showed correlated fluctuations of photoluminescence intensity and spatial localization of individual perovskite (CH3NH3PbI3) nanocrystals of size ∼200 × 30 × 30 nm3. The photoluminescence blinking amplitude caused by a single quencher was a hundred thousand times larger than that of a typical dye molecule at the same excitation power density. The quencher is proposed to be a chemical or structural defect that traps free charges leading to nonradiative recombination. These trapping sites can be activated and deactivated by light.

Original languageEnglish
Pages (from-to)1603-1608
Number of pages6
JournalNano Letters
Volume15
Issue number3
DOIs
Publication statusPublished - Mar 11 2015
Externally publishedYes

Keywords

  • blinking
  • charge trapping
  • Perovskite
  • photoluminescence
  • single molecule spectroscopy
  • super-resolution microscopy

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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