Evidence of photo-and electrodarkening of (CdSe) ZnS quantum dot composites
J Rodrıguez-Viejo, H Mattoussi, JR Heine… - Journal of Applied …, 2000 - pubs.aip.org
We present a study of the kinetics of photoluminescence (PL) and cathodoluminescence
(CL) degradation of semiconductor quantum dot composites, formed by highly luminescent
(CdSe) ZnS core-shell nanocrystals embedded in a ZnS matrix. The photoluminescence and
cathodoluminescence spectra indicate that both emissions originate from the same near
band-edge state of the nanocrystals. We observe a strong decrease in the PL and CL
intensities with time. Photoluminescence experiments carried out at high laser fluences (0.5 …
(CL) degradation of semiconductor quantum dot composites, formed by highly luminescent
(CdSe) ZnS core-shell nanocrystals embedded in a ZnS matrix. The photoluminescence and
cathodoluminescence spectra indicate that both emissions originate from the same near
band-edge state of the nanocrystals. We observe a strong decrease in the PL and CL
intensities with time. Photoluminescence experiments carried out at high laser fluences (0.5 …