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Affiliation of Author(s):材料科学工程学院
Journal:Chinese Physics Letters
Funded by:自选课题
Abstract:The photoluminescence (PL) characteristics of ZnCuInS quantum dots (QDs) with varying ZnS shell thicknesses of 0, 0.5, and 1.5 layers are investigated systemically by time-correlated single-photon counting measurements and temperature-dependent PL measurements. The results show that a ZnS shell thickness of 1.5 layers can effectively improve the PL quantum yield in one order of magnitude by depressing the surface trapping states of the core ZnCuInS QDs at room temperature. However, the PL measurements at the elevated temperature reveal that the core-shell nanocrystals remain temperature-sensitive with respect to their relatively thin shells. The temperature sensitivity of these small-sized single-layered core-shell nanocrystals may find applications as effective thermometers for the in vivo detection of biological reactions within cells.
First Author:zhongqiulin
Indexed by:Journal paper
Volume:34
Issue:4
Page Number:2
ISSN No.:0256-307X
Translation or Not:no
CN No.:11-1959/O4
Date of Publication:2017-03-21
