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Aboma Mendasa, MSc, PhD. Photo.

Aboma Merdasa

Researcher

Aboma Mendasa, MSc, PhD. Photo.

Giant Photoluminescence Blinking of Perovskite Nanocrystals Reveals Single-Trap Control of Luminescence.

Author

  • Yuxi Tian
  • Aboma Merdasa
  • Maximilian Peter
  • Mohamed Qenawy
  • Kaibo Zheng
  • Carlito Ponseca
  • Tönu Pullerits
  • Arkady Yartsev
  • Villy Sundström
  • Ivan Scheblykin

Summary, in English

Fluorescence super-resolution microscopy showed correlated fluctuations of photoluminescence intensity and spatial localization of individual perovskite (CH3NH3PbI3) nanocrystals of size ∼200 × 30 × 30 nm(3). 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.

Department/s

  • Chemical Physics

Publishing year

2015

Language

English

Pages

1603-1608

Publication/Series

Nano Letters

Volume

15

Issue

3

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Condensed Matter Physics
  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1530-6992