Dangling Bond Spins Controlling Recombination Dynamics of Excitons in Colloidal Nanocrystals and Nanoplatelets
- Authors: Rodina A.V.1, Golovatenko A.A.1, Shornikova E.V.2,3, Yakovlev D.R.1,2, Efros A.L.4
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Affiliations:
- Ioffe Institute
- Experimentelle Physik 2
- Rzhanov Institute of Semiconductor Physics
- Naval Research Laboratory
- Issue: Vol 52, No 5 (2018)
- Pages: 572-574
- Section: XXV International Symposium “Nanostructures: Physics and Technology”, Saint Petersburg, Russia, June 26–30, 2017. Excitons in Nanostructures
- URL: https://journals.rcsi.science/1063-7826/article/view/203042
- DOI: https://doi.org/10.1134/S1063782618050263
- ID: 203042
Cite item
Abstract
We show theoretically that spins of dangling bonds (DBSs) at the surface of colloidal nanostructures can be responsible for the dark exciton radiative recombination governing low temperature photoluminecence. The DBS-assisted dark exciton recombination is efficient when all spins are randomly oriented. The DBS polarization caused by external magnetic field or by the formation of the dangling bond magnetic polaron (DBMP) at low temperatures suppresses the DBS-assisted recombination. The temperature or magnetic field control on the DBS-polarization allows to detect experimentally the presence of DBS and DBS-assisted recombination in CdSe nanocrystals and 2D nanoplatelets.
About the authors
A. V. Rodina
Ioffe Institute
Author for correspondence.
Email: Anna.rodina@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
A. A. Golovatenko
Ioffe Institute
Email: Anna.rodina@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
E. V. Shornikova
Experimentelle Physik 2; Rzhanov Institute of Semiconductor Physics
Email: Anna.rodina@mail.ioffe.ru
Germany, Dortmund, 44227; Novosibirsk, 630090
D. R. Yakovlev
Ioffe Institute; Experimentelle Physik 2
Email: Anna.rodina@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021; Dortmund, 44227
Al. L. Efros
Naval Research Laboratory
Email: Anna.rodina@mail.ioffe.ru
United States, Washington DC, 20375