Luminescence relaxation dynamics for planar and rolled-up CdSe nanocrystals in a photonic-crystal matrixстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 27 мая 2021 г.
Аннотация:Samples of inverted photonic-crystal films, containing
planar and rolled-up (in the form of scrolls) CdSe nanocrystals, are
studied. The transmission spectra of these structures are recorded.
These spectra (along with the change in colour) confirm the incorporation
of nanocrystals into the films. The photoluminescence
decay dynamics is investigated. It is shown that the photonic-crystal
matrix affects significantly the luminescence kinetics of nanostructures.
The differences in the decay curves measured for nanocrystals
in a photonic-crystal matrix and for their ensemble on a
glass substrate are explained by the influence of the photonic-crystal
stop band and the orientational effect of crystalline matrix,
which orients anisotropic nanocrystals and prevents them from
aggregation. The results obtained may be important for potential
applications in optoelectronic devices.