Photoluminescence of the PbS quantum dots fabricated by the Langmuir-Blodgett technique

The optical and structure properties of the PbS nanoclusters in the Langmuir-Blodgett matrix as well as their properties after the matrix removal in the ammonium atmospheres have been studied. According to the electron microscopy data, it has been established that there are PbS nanoclusters formed o...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-06, Vol.864 (1), p.12074
Main Authors: Gulyaev, D.V., Sveshnikova, L.L., Bacanov, S.A., Gutakovskii, A.К., Zhuravlev, K.S.
Format: Article
Language:English
Subjects:
Enlargement
Luminescence
Nanoclusters
Nanocrystals
Optical properties
Photoluminescence
Physics
Quantum dots
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Summary:The optical and structure properties of the PbS nanoclusters in the Langmuir-Blodgett matrix as well as their properties after the matrix removal in the ammonium atmospheres have been studied. According to the electron microscopy data, it has been established that there are PbS nanoclusters formed on the surface of the samples. It has been found that the matrix removal results in a significant enlargement of the PbS nanocrystals accompanied by the shift of the luminescence into the infra-red range. It has been shown that the PL intensity of PbS quantum dots (QDs) in the matrix decreases with the temperature decrease due to the carrier transfer into defect QDs whereas the the luminescence intensity of the PbS nanocrystals without a matrix grows at the temperature increase.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/864/1/012074