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Direct Determination of Spatial Localization of Carriers in CdSe-CdS Quantum Dots
Joint Authors
Toprak, M. S.
Zhao, Yichen
Sugunan, Abhilash
Wang, Qin
Yang, Xuran
Rihtnesberg, David B.
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-08-27
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Colloidal quantum dots (QDs) have gained significant attention due to their tunable band gap, simple solution processability, ease of scale-up, and low cost.
By carefully choosing the materials, core-shell heterostructure QDs (HQDs) can be further synthesized with a controlled spatial spread of wave functions of the excited electrons and holes for various applications.
Many investigations have been done to understand the exciton dynamics by optical characterizations.
However, these spectroscopic data demonstrate that the spatial separation of the excitons cannot distinguish the distribution of excited electrons and holes.
In this work, we report a simple and direct method to determine the localized holes and delocalized electrons in HQDs.
The quasi-type-II CdSe-CdS core-shell QDs were synthesized via a thermolysis method.
Poly(3-hexylthiophene) (P3HT) nanofiber and ZnO nanorods were selected as hole and electron conductor materials, respectively, and were combined with HQDs to form two different nanocomposites.
Photoelectrical properties were evaluated under different environments via a quick and facile characterization method, confirming that the electrons in the HQDs were freely accessible at the surface of the nanocrystal, while the holes were confined within the CdSe core.
American Psychological Association (APA)
Zhao, Yichen& Sugunan, Abhilash& Wang, Qin& Yang, Xuran& Rihtnesberg, David B.& Toprak, M. S.. 2015. Direct Determination of Spatial Localization of Carriers in CdSe-CdS Quantum Dots. Journal of Nanomaterials،Vol. 2015, no. 2015, pp.1-7.
https://search.emarefa.net/detail/BIM-1068921
Modern Language Association (MLA)
Zhao, Yichen…[et al.]. Direct Determination of Spatial Localization of Carriers in CdSe-CdS Quantum Dots. Journal of Nanomaterials No. 2015 (2015), pp.1-7.
https://search.emarefa.net/detail/BIM-1068921
American Medical Association (AMA)
Zhao, Yichen& Sugunan, Abhilash& Wang, Qin& Yang, Xuran& Rihtnesberg, David B.& Toprak, M. S.. Direct Determination of Spatial Localization of Carriers in CdSe-CdS Quantum Dots. Journal of Nanomaterials. 2015. Vol. 2015, no. 2015, pp.1-7.
https://search.emarefa.net/detail/BIM-1068921
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1068921