Dangling Bond Spins Controlling Recombination Dynamics of Excitons in Colloidal Nanocrystals and Nanoplatelets
| Autor: | A. A. Golovatenko, Anna V. Rodina, Al. L. Efros, Dmitri R. Yakovlev, Elena V. Shornikova |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Quantitative Biology::Neurons and Cognition Spins Exciton Dangling bond 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter Physics Polaron 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Magnetic field Condensed Matter::Materials Science Nanocrystal Chemical physics 0103 physical sciences Spontaneous emission 010306 general physics 0210 nano-technology Nonlinear Sciences::Pattern Formation and Solitons Recombination |
| Zdroj: | Semiconductors. 52:572-574 |
| ISSN: | 1090-6479 1063-7826 |
| DOI: | 10.1134/s1063782618050263 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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