Effect of shell thickness on heterostructure of CdSe/CdS core/shell nanocrystals
Vol. 131 No. 1B (2022), Original Article
Vol. 131 No. 1B (2022)

Effect of shell thickness on heterostructure of CdSe/CdS core/shell nanocrystals

Original Article
https://doi.org/10.26459/hueunijns.v131i1B.6491
Published 2022-06-30
Anh Thi Le
Institute of Research and Development, Duy Tan University, 3 Quang Trung St., Da Nang, Vietnam
Minh Tan Man
Institute of Theoretical and Applied Research, Duy Tan University, Hanoi, Vietnam
Minh Hoa Nguyen*
Faculty of Fundamental Sciences, University of Medicine and Pharmacy, Hue University, 6 Ngo Quyen St., Hue, Vietnam
http://orcid.org/0000-0002-8257-6032
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Keywords

Core/shell quantum dots, semiconductor nanocrystals, core-shell heterostructures, bandgap tunability, optical materials

How to Cite

1.
Le AT, Man MT, Nguyen MH. Effect of shell thickness on heterostructure of CdSe/CdS core/shell nanocrystals. hueuni-jns [Internet]. 2022Jun.30 [cited 2024Nov.28];131(1B):5-10. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/6491
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Abstract

Core/shell hetero-nanostructures are promising materials for fabricating optoelectronic devices, photodetectors, bioimaging, and biosensing. The CdSe/CdS core/shell nanocrystals (NCs) were synthesized in a wet chemical reaction. The shell thickness was modified by varying reaction times. The structure and optical properties as a function of the CdS shell thickness were investigated. A systematic redshift of the first exciton absorption peaks and photoluminescent (PL) spectra occurred after coating with CdS confirmed the shell growth over the CdSe core. The PL's intensity increased compared with that of bare NCs. The formation of high-quality NCs with uniform size distribution was shown in the transmission electron microscopy (TEM) image and confirmed by the narrow PL band and small FWHM.

https://doi.org/10.26459/hueunijns.v131i1B.6491
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