Upconversion luminescence of colloidal CdS and ZnCdS semiconductor quantum dots

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DOIResolve DOI: http://doi.org/10.1021/jp074416b
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TypeArticle
Journal titleThe journal of physical chemistry. C, Nanomaterials and interfaces
Volume111
Issue4
Pages1626116266; # of pages: 6
AbstractUpconversion luminescence is observed from colloidal CdS and CdZnS quantum dots dispersed in hexanes. These binary and ternary nanocrystals were synthesized via noninjection approaches and at relatively low temperature and exhibit cubic crystal structures and narrow size distributions. The upconversion luminescence of these nanocrystal ensembles is similar to their corresponding photoluminescence emission, regarding peak shape, position, and dynamics. The upconversion luminescence yield exhibits a near-quadratic laser power dependence. Accordingly, our study indicates that the upconversion luminescence is due to two-photon excitation.
Publication date
AffiliationNRC Institute for Microstructural Sciences; National Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12743975
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Record identifier9d9b2b2b-301b-4688-af34-4182a6805bf0
Record created2009-10-27
Record modified2016-05-09
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