Open AccessNonradiative recombination channel of dark excitons in colloidal CdSe nanoplatelets
Author(s) -
A. A. Golovatenko
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1695/1/012173
Subject(s) - exciton , photoluminescence , recombination , polarization (electrochemistry) , colloid , materials science , molecular physics , chemical physics , atomic physics , optoelectronics , condensed matter physics , physics , chemistry , biochemistry , gene
Nonradiative recombination channel of spin-forbidden dark excitons in colloidal 4 ML thick CdSe nanoplatelets synthesized in argon and ambient atmosphere is revealed by theoretical analysis of time-resolved photoluminescence. The nonradiative recombination lifetime τ nr ≈ 11 ns is found to be independent on nanoplatelets synthesis atmosphere. It is shown that the presence of the nonradiative recombination channel affects spin polarization of dark excitons and results in the time dependence of the circular polarization degree of photoluminescence in the external magnetic field.