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Nano Research 2015, 8(5): 1443-1453 https://doi.org/10.1007/s12274-014-0629-2
Research Article | Issue | Published: 28 April 2015

Excellent photothermal conversion of core/shell CdSe/Bi2Se3 quantum dots

Show Author's Information Guo Zhi Jia1,2,  Wen Kai Lou1,  Fang Cheng3,  Xiong Long Wang4,  Jiang Hong Yao4,  Ning Dai5,  Hai Qing Lin6,  Kai Chang1( )
Institute of SemiconductorsChinese Academy of Sciences, P.O. Box 912Beijing100083China
Tianjin Chengjian UniversityTianjin300384China
Department of Physics and Electronic ScienceChangsha University of Science and TechnologyChangsha410004China
Key Laboratory of Weak-Light Nonlinear PhotonicsMinistry of EducationSchool of Physics and TEDA Applied Physics SchoolNankai UniversityTianjin300457China
The National Laboratory for Infrared Physicsthe Shanghai Institute of Technical Physics of the Chinese Academy of SciencesShanghai200083China
Beijing Computational Science Research CenterBeijing100084China
Keywords:
quantum dots, photothermal, cation exchange, type-Ⅱ heterostructure, CdSe/Bi2Se3
Cite this article:
Jia GZ, Lou WK, Cheng F, et al. Excellent photothermal conversion of core/shell CdSe/Bi2Se3 quantum dots. Nano Research, 2015, 8(5): 1443-1453. https://doi.org/10.1007/s12274-014-0629-2
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Abstract Full text Electronic supplementary material About this article

Water-dispersed CdSe/Bi2Se3 core/shell QDs with a photothermal conversion coefficient of 27.09% have been synthesized by a cation exchange reaction. The microstructure and crystal structure of the QDs, which were confirmed by TEM and XRD, showed that partial cation exchange occurred inside the CdSe QDs. Two main mechanisms are responsible for the excellent photothermal conversion: inhibition of radiative recombination of carriers due to the formation of type-Ⅱ semiconductor heterostructures, and the large surface-to-volume ratio of the QDs. Photothermal conversion experiments indicated that the CdSe/Bi2Se3 QDs showed high photothermal conversion efficiency and excellent NIR photostability.


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Electronic supplementary material
About this article

Excellent photothermal conversion of core/shell CdSe/Bi2Se3 quantum dots

Show Author's information Guo Zhi Jia1,2, Wen Kai Lou1, Fang Cheng3, Xiong Long Wang4, Jiang Hong Yao4, Ning Dai5, Hai Qing Lin6, Kai Chang1( )
Institute of SemiconductorsChinese Academy of Sciences, P.O. Box 912Beijing100083China
Tianjin Chengjian UniversityTianjin300384China
Department of Physics and Electronic ScienceChangsha University of Science and TechnologyChangsha410004China
Key Laboratory of Weak-Light Nonlinear PhotonicsMinistry of EducationSchool of Physics and TEDA Applied Physics SchoolNankai UniversityTianjin300457China
The National Laboratory for Infrared Physicsthe Shanghai Institute of Technical Physics of the Chinese Academy of SciencesShanghai200083China
Beijing Computational Science Research CenterBeijing100084China

Abstract

Water-dispersed CdSe/Bi2Se3 core/shell QDs with a photothermal conversion coefficient of 27.09% have been synthesized by a cation exchange reaction. The microstructure and crystal structure of the QDs, which were confirmed by TEM and XRD, showed that partial cation exchange occurred inside the CdSe QDs. Two main mechanisms are responsible for the excellent photothermal conversion: inhibition of radiative recombination of carriers due to the formation of type-Ⅱ semiconductor heterostructures, and the large surface-to-volume ratio of the QDs. Photothermal conversion experiments indicated that the CdSe/Bi2Se3 QDs showed high photothermal conversion efficiency and excellent NIR photostability.

Keywords: quantum dots, photothermal, cation exchange, type-Ⅱ heterostructure, CdSe/Bi2Se3

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Publication history
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Acknowledgements

Publication history

Received: 09 July 2014
Revised: 27 October 2014
Accepted: 30 October 2014
Published: 28 April 2015
Issue date: May 2015

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014

Acknowledgements

Acknowledgements

This work has been partly supported by the National Basic Research Program of China (973 Program) No. 2011CB922204-2, and the National Natural Science Foundation of China (Nos. 11434010, 11147024, 11247025, 11304306, 11374002, and 61290303).

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